How to Clean a Copper Coin with Vinegar

Cleaning silver and copper coins with soda, recipe: with vinegar, salt, foil, ammonia, cooking, boiling, reviews

The task of returning the former shine to a coin that has darkened over time due to layering oxides and impurities becomes feasible if you have information about the techniques for performing procedures based on baking soda (sodium bicarbonate), taking into account the specifics of the metal.

Cleaning coins with soda - proven recipes

If you decide to clean rare coins yourself, you should turn to proven recipes.

Soda + vinegar

To wash copper coins covered with a greenish coating, prepare two enamel bowls. Water is poured into one - 500 ml. While stirring, dilute table vinegar (9%) - 4 tbsp. l. In another container, dissolve baking soda in 100 ml of water - 5 tbsp. l.

The dishes with the vinegar solution are placed on the stove. When heated slowly, bring to a boil and add banknotes requiring restoration. Every five minutes, remove the container from the heat and check the result. If it is satisfactory, then use a wooden spoon to transfer the money rounds into the soda solution.

As the neutralization reaction occurs, a characteristic hissing sound is heard. After two minutes, remove the products and rub them with a piece of felt. This method is suitable if you need to clean silver coins.

For varieties made of hard metals, the following sequence of actions is useful:

1. Pour table vinegar (9%) - 200 ml into an enamel mug.
2. Add baking soda - 1 tsp.
3. After the reaction stops, the products are loaded.
4. Leave until the stains disappear.
5. Then the surfaces are carefully rubbed with laundry soap.
6. Treat with a soft brush.
7. Wash with warm water.

If necessary, repeat the procedure. Using this method, it is not recommended to clean silver, gold, and copper varieties. Rust appears on metal coins.

A gruel made from a small amount of table vinegar (9%) with the addition of soda will help remove traces of it. Take a small amount of mass with a piece of soft rag and wipe the surfaces. Then be sure to rinse with water and dry.

This method is also recommended for low-grade copper and silver items, allowing you to remove corrosion marks and stubborn stains.

How to skeletonize leaves with soda

Ammonia + soda

A mixture of ammonia, toothpaste without abrasives and baking soda will help you put high-grade silver in order. The components are taken in equal volume fractions.

The coins are coated with the resulting paste and gently rubbed with your fingers, or you can use a brush with soft bristles. After thorough rinsing, dry on a paper towel.

Soda + salt

Combine fine salt with baking soda - 1 tbsp. l. Place regular foil used for baking on the bottom of a deep plate.

Pour in the soda-salt mixture. They lay out monetary items. Carefully pour boiling water - 250 ml. Wait approximately 30 minutes. Cleaned products are washed.

Other ways to clean coins

If necessary, some simple techniques are practiced in order to clean old coins.

Soda + boiling water

For billon varieties, the following method is effective:

1. Place baking soda in a ceramic mug - 1 tbsp. l.
2. Pour boiling water - 250 ml.
3. They mix and put in coins.

After the solution has cooled, repeat the procedure, preparing a fresh portion. In total, practice up to five approaches, checking the result each time.

With dish gel

The following technique works effectively:

1. Pour 200 ml of hot water into an earthenware bowl.
2. Stir soda - 2 tbsp. l. Additionally, add dish gel - ¼ tsp.
3. Silver signs are left in this product for eight hours.

Don’t forget to rinse them thoroughly and gently remove the moisture with a paper towel.

Soap + soda

Removes green plaque, preserving the noble patina, a technique for which baby soap is used.

Preparation:

1. Rub a bar of soap into a medium-deep earthenware plate.
2. When the bottom is completely covered with shavings, pour boiling water to half the volume of the plate.
3. Separately, dissolve soda in 50 ml of hot water - 1 tbsp. l. and add to the plate.
4. After mixing, place the coins in a soda-soap solution, which, after cooling, acquires a jelly-like consistency.

How to test wine for naturalness with soda

Every 24 hours, the products are taken out and treated with a not very hard brush. If necessary, prepare a fresh portion and repeat the cleansing session.

Universal method

You can prepare a universal paste suitable for different coins, focusing on the following algorithm:

1. Dissolve 1 tsp in 50 ml of warm water. sodium bicarbonate.
2. Pour a quarter cup of boiling water into another bowl and stir until smooth shavings of baby soap - 0.5 tbsp. l.
3. Combine the two solutions.
4. Toothpaste without abrasives and dyes is administered - 150 ml.
5. Add ammonia - 50 ml.
6. Mix thoroughly and immerse banknotes. Every 30 minutes, remove the products and brush them with a toothbrush.

After obtaining a satisfactory result, you must thoroughly wash the items under plenty of water.

Cooking coins

For copper coins that are contaminated and covered with green growths, boiling using sodium bicarbonate is used effectively.

You will need an iron bowl, a piece of soft rag, a disused soft toothbrush, tweezers, olive oil - 2 tbsp. l., which is poured into a small bowl.

Cooking sequence:

1. Pour 200 ml of water into a metal bowl.
2. Add baking soda - 2 tsp.
3. Mix thoroughly.
4. Place coins that should completely disappear in the solution. There should be at least 20 mm of liquid above them.
5. Place the container on the stove and, with low heat, bring to a boil, continuing to cook the contents.

After a quarter of an hour, remove the product using tweezers, wipe it with a brush, then with a rag soaked in oil, and check the result. If the cleaning is insufficient, immerse it back. On average, the entire procedure takes 45 minutes. Do not allow the appearance of a red tint, which indicates the beginning of the patina. Cleaned signs are washed with soap, rinsed well and dried.

Boiling

To effectively free silver coins covered with a blackened coating, boiling is carried out.

Soda + foil

To carry out the cleansing procedure, pour slightly warmed water - 500 ml - into a bowl. Add sodium bicarbonate - 2 tsp. After thorough mixing, pour the liquid into a saucepan and place on the stove. Bring the liquid to a boil. Since it will foam a lot, continue stirring, avoiding pouring it onto the burner.

How to soften water with soda at home

Separately, place foil in a deep plate. Place coins and fill with soda solution. Products are checked periodically. After cleansing, rinse with cool water.

Why do copper coins turn red?

Sometimes a red coating appears on copper banknotes. This indicates the accumulation of cuprous oxide, which has a similar color.

It is possible to remove redness by completely immersing the products in an ammonia solution with a concentration of 10%. Avoid contact of coins with air during the process, which causes destruction.

Sulfur ointment, which is evenly wiped over the surfaces and then polished with a piece of felt, helps to muffle the pronounced redness and restore the noble shade of the patina.

Reviews

There are many ways to clean various coins. The opinions of experienced people are of interest.

Denis. 35 years.

Cleaning oxidized cash items with soda should be done very carefully, without leaving any traces of residue. Otherwise, after a while the entire surface will bloom. After cleaning, I lubricate the surfaces with Vaseline and wipe them thoroughly with a soft cloth, removing the characteristic shine.

Alexander. 40 years.

A friend told me that soda ash effectively cleans metal banknotes. I decided to try it. Dissolved a tablespoon of crystals in a liter of water. I downloaded several pieces. A day later I checked and was surprised. I cleaned it with a brush, the patina is in place, and the dirt has disappeared.

Svetlana. 38 years.

Having discovered an unpleasant shine on copper coins after cleaning activities, a composition is prepared to recreate the patina. Pour 1 liter of distilled water into an enamel bowl. Crystals of potassium permanganate - 5 g and copper sulfate powder - 50 g are dissolved in it.

Heat to approximately 75˚C and place objects. Keep them until the desired shade appears. Then the products are washed and laid out on a soft paper towel. It is advisable to cover completely dry coins with a layer of molten paraffin.

After the thinnest film has hardened, the banknotes will retain their external decor for a long time.

Source: https://soda-soda.ru/lajhfaki/kak-chistit-varit-i-kipyatit-moneti-sodoi.html

How to properly clean coins with vinegar

Many people collect coins. Over time, dirt appears on their surface, which negatively affects their appearance. There are several ways to cleanse: using store-bought and home remedies. Cleaning coins with vinegar at home is the most popular. The effect is noticeable after the first time, and the procedure takes 10-15 minutes.

Vinegar is suitable for cleaning all types of coins

Why clean coins

Cleaning is necessary to maintain the appearance of the products. If you do not periodically remove dirt from the surface, it will be almost impossible to clean the products in the future.

Cleaning Features

The choice of the optimal method is made taking into account the specific properties of the metal . Compliance with cleaning rules will return your money to its original appearance.

Type of coins	Cleaning Features
Copper	Copper products develop a patina, a layer that protects the coin from corrosion and gives it a noble appearance. It cannot be removed from the surface. Remove greasy marks from coins using a soap solution and dark water. To prevent corrosion, use aggressive substances such as citric and acetic acids. To remove minor stains, dip the coins in the solution for 2-3 hours; for heavy stains, leave the coins in the acid overnight.
Nickel	There is no point in using a soap solution. Soda, electrolysis, ayran, cigarette ash, hydrochloric acid and vinegar are suitable for cleaning.
Bronze	Use the same cleaning methods as for copper coins. Please note that ammonia changes the color of products.
Silver	Consider the characteristics of the metal. Place high-grade silver items in a solution of ammonia or a mixture of soda and water for 40-60 minutes. The procedure time depends on the degree of contamination. Prepare a solution based on ammonia, keeping the proportions 1:9. For 10 ml of ammonia, take 90 ml. water. To prepare a soda solution, use 30 g of sodium bicarbonate and 100 ml. liquids. To speed up the process, boil the mixture several times and scrub the contaminated areas with a soft brush. Clean high-grade money with minor traces of oxidation with a mixture of toothpaste, ammonia and baking soda. To treat low-grade silver coins, use Trilon B solution.
Gold	Mechanical cleaning is contraindicated. The softest fabrics can leave scratches and damage on precious metal coins. If dirt appears, treat gold items in a soapy solution and rinse off any remaining residue under running water. Finally, dry the coins thoroughly.
Soviet times USSR	Soviet coins made of copper-nickel alloy. Cleaning Soviet coins with vinegar is carried out in the same way as for nickel products. Vinegar is the most effective in combating stains. It is important to strictly follow the instructions so that rainbow stains do not appear on the surface of the coins and the products do not lose their attractive appearance.

It is prohibited to use sulfuric and nitric acids to clean copper or silver coins, since the substances destroy small details of the design.

Acetic acid is a universal remedy. It solves many everyday problems. The housewife needs to know how to clean a carpet at home with soda and vinegar.

https://www.youtube.com/watch?v=bam1IE5TRy0

Use table vinegar for cleaning

Use table vinegar for cleaning

How to clean at home

Few people know how to clean coins with vinegar. Cleaning carried out in the absence of knowledge and experience will not give the products their original appearance, but will only cause harm.

Using vinegar

The acid is suitable for cleaning money from all types of metal. In some cases, vinegar is considered the only possible way to process products. To carry out the procedure you will need:

• brass brush or sponge;
• deep bowl;
• acid;
• water.

Mix vinegar with water in a ratio of 1:10. Place the product in the solution. After 7-8 hours, take it out and remove oxides from the surface with a sponge or brush, then place it again in a mixture of water and acid. For minor contamination, 3-4 cycles are sufficient, if the coin is heavily damaged – 8-10. Finally, soak a clean cotton cloth in alcohol, wipe the items and set them to dry.

It is advisable to use table vinegar to clean money. Avoid fruit acids, since their concentration is lower and they are not as aggressive as a synthetic product. Do not keep the mixture with acid on coins longer than prescribed

How to clean with salt, flour and vinegar

Ingredients:

1. Flour – 1 tbsp.
2. Salt – 1 tbsp.
3. Acetic acid – 3-4 drops.

Preparation:

In a deep glass or metal bowl, mix flour, salt and vinegar.

Application:

Apply the resulting mixture to the coin and leave for 10-15 minutes. After the specified time has passed, wash off any remaining product from the surface of the product with warm water. Wipe the coin dry with a soft cloth that will not leave scratches.

Result:

The effect of the procedure is noticeable after the first time. If the coins are heavily soiled, they will need to be cleaned again.

You cannot use plastic containers to prepare a mixture of flour, vinegar and salt.

If vinegar is not available, use citric acid. It is effective not only for removing dirt from coins, but also for solving other everyday problems. Many housewives are interested in how to boil a kettle with citric acid so that the scale disappears from the surface and the appliance regains its original appearance.

See how to clean copper coins with vinegar:



Vinegar, salt and brass

The brass brush is not suitable for all coins. Mechanical cleaning is not suitable for gold items.

Ingredients:

1. Vinegar – 3-4 drops;
2. Salt – 1 tbsp.

Preparation:

Place the acid and salt in a deep metal or glass bowl and mix the ingredients.

Application:

Apply the paste to both sides of the coins and leave for 10-15 minutes. After the specified time has passed, scrub the products with a brass brush and rinse off any remaining solution from the surface with warm water. Finally, dry the coins.

Result:

The result is noticeable after the first cleaning. A brass brush removes the toughest stains.

Have you tried cleaning coins with vinegar?

Vinegar with salt

The method is suitable for cleaning nickel coins. In a deep container, mix 50 g and 1 tsp. table salt. Place coins at the bottom of the vessel. After 5-7 minutes, turn the product over. Repeat the procedure until contaminants disappear from the surface of the products.

Acid is also used for other purposes. Many people are interested in how to clean a kettle from scale with vinegar.

See how to clean Soviet coins with salt and vinegar



How to clean with baking soda and vinegar

The recipe is suitable for processing low-grade copper and silver coins.

Ingredients:

1. Vinegar – 10 ml.
2. Soda – 1 tbsp.

Preparation:

In a deep bowl, mix acid and soda. If the product turns out liquid, add sodium bicarbonate.

Application:

Apply the prepared slurry to the contaminated surface of the coins. After 10-15 minutes, rinse off the remaining product from the products with warm water. At the end of the procedure, dry the coins thoroughly.

Result:

The cleaning effect is noticeable after the first time. In some cases, a repeat procedure will be required.

Keep track of the time the acid-soda mixture remains on the money. Leaving the product for a long time will ruin the appearance of the products.

Vinegar with hydrogen peroxide: proportions and how long to keep

Ingredients:

1. Hydrogen peroxide – 30 ml.
2. Ammonia – 1 tsp.
3. Vinegar – 1 tsp.
4. Water – 200 ml.

Preparation:

Mix peroxide, alcohol and vinegar in a deep container. Add water and mix thoroughly.

Application:

Place the contaminated money into the resulting solution. After 15 minutes, remove the products and rinse under running water. Dry the coins thoroughly and wipe with a soft cloth.

Result:

The effect of the procedure is noticeable after the first use of the home remedy. Re-clean if necessary.

Drying: rules and how long

It is important not only to know how to clean coins with vinegar, but also to have an understanding of how to properly dry items. Otherwise, after some time, streaks will appear on the surface.

Use a clean cotton cloth or paper towels folded in several layers. The drying material must be soft. Otherwise, scratches and mechanical damage will appear on the surface of the money.

There is another way to dry coins. But it is more expensive because it involves the use of a special device, a drying cabinet.

Drying with crumpled newspapers is no less effective. It is not suitable for items made of precious metal, as it will ruin the appearance of the coins by leaving scratches on them. Crumpled newspapers slow down oxidation.

Conclusion

Coins lose their original appearance over time. The shine disappears, and dirt appears on their surface. To clean products, store-bought products are also used, but an alternative is table vinegar.

Choose the cleaning method depending on the characteristics of the products. Only gentle methods are used to process precious metal money. Products must be dried thoroughly using soft natural fabrics or paper towels. Vinegar is considered a universal remedy. It is suitable for cleaning all types of coins, including gold ones. In the case of the latter, it is important to follow the recipe. It is also possible to clean the microwave at home with vinegar and soda.

Was the information in the article helpful? Are you ready to use recipes to cleanse your money? Then leave comments about the result and share the information with your friends.

Reviews from those who have tried cleaning coins with vinegar

I only use vinegar to clean the coins in my collection. Before this, I tried to treat products with store-bought products, but the effect of their use was barely noticeable. Even my hands dropped. A friend came to the rescue and recommended using acetic acid. The costs are minimal, and the effect is noticeable after the first procedure. I dry coins very carefully. I use a soft cloth. I plan to purchase a drying cabinet. The youngest son began collecting coins.

I was happy to support his hobby. I purchased a coin from a collector for my child’s collection. It turned out to be rare, but not in very good condition. There was a lot of dirt on the surface. I didn’t want to give the product to my son in this form. I decided to restore the original appearance and add shine. I thought for a long time about how to do this, looked for information on the Internet. I read about the miraculous properties of vinegar and decided to try the recipes in practice.

There was no limit to my surprise when I noticed that after the first procedure the coin became much cleaner and had a shine. I have been collecting coins for 10 years. For the first few years I didn’t take care of them at all. Then I noticed that they had noticeably faded and dirt appeared on their surface. I decided to use the old grandfather’s cleaning method using vinegar, soda and flour. The result is noticeable after the first procedure. As a preventative measure, I treat coins with homemade paste once a year.

I'm a perfectionist. I'm used to everything being clean and well-groomed. It was a shame to take out dirty coins in stores. So I decided to correct the situation and clear the change. I used baking soda and vinegar. I have known about their miraculous properties for a long time. I treated the coins with the mixture, washed them thoroughly, dried them and, voila, the money was like new. I have been collecting coins for a while now. There is no time to look after them. At one point I noticed that the coins stopped shining and dirt appeared on their surface.

I thought for a long time about how to clean out the collection. My wife came to the rescue. She suggested using peroxide and vinegar.

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Source: https://uksus-hous.ru/v-bytu/chistka-monet-uksusom

We clean copper and silver coins in different ways: vinegar, soda, salt and other substances

Regular and collectible coins with significant dirt can be restored to their former purity and shine. The most gentle methods are to clean coins with vinegar, soda and salt, as well as laundry soap and ammonia. Before cleaning valuable specimens at home, numismatists strongly recommend determining the composition of the metal and its fineness. The choice of cleaning agent depends on this.

How to clean with soda

A simple method that is suitable for most low-grade silver and copper coins. Soda is used in households to remove various contaminants, including from metal surfaces.

Cleaning steps using baking soda:

1. Mix the powder with a small amount of water to make a paste.
2. Apply the mixture to the coin.
3. Using a thick cloth or brush (you can use a soft toothbrush), wipe the metal.
4. Wipe the coin until both sides are completely clean.

A softer method that can be used on high-grade silver samples:

1. Prepare a solution of 30 g of soda and 100 ml of water.
2. Immerse the metal in it and wait a couple of hours.
3. Rinse in clean water and dry.

Method with vinegar

This method is suitable for deeper stains. Use ordinary table vinegar as an acid, and soda as an alkali. The vinegar solution removes greenish and yellowish deposits well on copper.

How to clean copper coins with vinegar:

1. Fill a small container with vinegar.
2. Place dirty coins into the liquid.
3. Let the metal stand for several hours.
4. Stop the reaction by neutralizing the acid with alkali. To do this, coins are covered with a slurry of water and soda and wiped with a brush, as in the first method.

Miss Purity magazine recommends that you treat copper coins with care without signs of corrosion or patina. It protects the metal from rust and gives it a noble appearance.

Salt for coin purity

Salt complements the action of soda well. If you mix the substances in equal proportions and pour boiling water over them, then immerse coins in the solution, then after just 30 minutes the result will be noticeable.

Digestion

Cooking significantly speeds up the cleaning process. Typically a soda solution is used:

1. Mix 1 tsp. soda and 100 ml of water.
2. Bring the solution with the objects immersed in it to a boil.
3. Hold the coins for about 5 minutes, then remove them with tweezers and evaluate the result. To do this, soak a piece of rag with vegetable oil and wipe the surface with it.
4. If it doesn’t work the first time, you need to return the samples to the boiling solution and try again.

Advice:
Practice on inexpensive items first, and then start cleaning more valuable ones.

Other methods: soap, ammonia

A coin on which traces of dirt are barely visible can simply be immersed in a paste of laundry soap. To do this, the block is rubbed, the shavings are mixed with water into a thick paste. You will have to wait 1-2 days. But after this all that remains is to remove the coin from the mixture and wipe it with a brush or rag. Cleaning with soap is the safest method, according to collectors' reviews.

An ammonia solution is suitable for removing green deposits on a copper coin. It is enough to hold the metal in the solution for no longer than 2 minutes. To wash high-grade silver, mix ammonia, soda and soft white toothpaste in equal proportions. The composition is used to wipe contaminated money, after which it is rinsed and dried.

Clean carefully. Start with the most gentle methods, adding more effective ones as needed. The substances will not be able to return the metal to its original appearance, but will significantly bring its condition closer to ideal.

Source: https://mschistota.ru/sredstva/chistka-mednyx-i-serebryanyx-monet.html

How to clean a copper coin at home? — Machine tools, welding, metalworking

How to clean old copper coins. Advice from experienced numismatists.

Restoring coins is a difficult job. Each metal from which a coin is minted, be it silver, gold, copper or iron, requires a special approach. Some are better not to clean at all, with others you can simply use a soapy solution, and for others you will need special cleaning products. Below we will tell you how to clean an ancient coin found in the ground.

How to clean coins

When cleaning any coin, it is important to remember: each metal has its own approach. If we talk, for example, about gold and platinum, it is better to do without cleaning at all or limit yourself to soapy water. No abrasives or hard metal brushes, just like with silver. Poor mechanical cleaning can leave scratches and the coin will lose its value.

There are 4 main ways to clean old coins:

• Chemical;
• Mechanical;
• Cooking;
• Electrolysis.

They are all used in different cases, at different levels of contamination, with different metals. For example, electrolysis is used only in cases where no serious damage or pronounced cavities are found on the coin.

This is a fairly simple method. The coin is immersed in a slightly salted solution and an electric current is applied to it.

At the end of the procedure, the coin takes on a new, fresh look, but defects such as mechanical damage, oxides and cavities may appear.

Mechanical cleaning involves the use of various tools. This allows you to qualitatively eliminate various types of contaminants. But it is important to remember: this is a very small and complex job, there is a danger of damaging the integrity of the metal of the coin.

Dry cleaning is the use of various reagents, ammonia, acids, soda, household chemicals, detergents, soap, and washing powder. This method takes longer, since coins must be kept in solutions for several hours, and sometimes for several days.

But this method is suitable for almost all metals.

Boiling is a way to clean up dirty coins, which involves immersing them in boiling water with the addition of soda, petroleum jelly or olive oil. Cooking is faster than dry cleaning, but you need to remember one important rule: for high-quality restoration of a coin, it is better to combine several methods.

How to Clean a Copper Coin

Copper was one of the first metals used to mint coins. Copper coins are well valued by numismatists and have their own characteristics. Copper coins are not resistant to corrosion, which must be taken into account when choosing a method for cleaning them. In addition, the appearance of a patina of dark green, brown or completely black is considered absolutely normal and even positive.

There is a misconception that patina, like other oxides, needs to be cleaned and removed. On the contrary, it is an indicator of the value of the coin and protects it from external influences, including corrosion. An even, dense layer of patina is an indicator of the quality of a copper coin. Removing it can significantly reduce its cost.

Dry cleaning involves the use of various means:

• Soap;
• Vinegar;
• Ammonia;
• Lemon acid;
• Ammonia.

Ancient copper coins are also put in order by electrolysis, boiling in soda and mechanically using various tools.

The reddish coating is removed by immersion in a five percent ammonia solution. Green scale (copper carbonate) - with a ten percent solution of citric acid, yellow scale - with acetic acid in the same proportion.

To achieve the highest quality result after dry cleaning, coins can be boiled separately in a soda solution or distilled water. One of the main rules of digestion is that the liquid must always cover the coin by at least 2 cm.

In order for the coin to be cleaned evenly, it is better to place it not on one side, but to place it leaning against the walls of the container.

Source: https://stanki-info.com/kak-pochistit-mednuyu-monetu-v-domashnih-usloviyah/

How to clean a cupronickel coin

Cupronickel is a silver-colored alloy of copper and nickel, which is used to produce various products. Most often used for making cutlery, dishes, coins and jewelry. It has pronounced anti-corrosion properties.

Products made from cupronickel have disadvantages, the main of which is darkening and stains resulting from prolonged use and exposure to external factors.

Many people wonder how to clean cupronickel? This can be done easily at home using certain tips.

Why does cupronickel darken?

There can be many reasons for the darkening of cupronickel; they depend on the type of product and storage conditions. It is worth highlighting the following main reasons for darkening in the case of dishes and cutlery:

1. High humidity. Moisture is the main enemy of cupronickel, causing stains. You should only store dishes and cutlery in a dry place, wiping them after washing. To prevent stains from appearing, it is recommended to use a dry, soft cloth.
2. Care. Nickel silver surfaces require special care, since microcracks can trap food and other substances, which significantly affect the brightness and appearance of the products.

Darkened cupronickel tableware

Coins darken over time due to many factors. Unlike cutlery, coins are not washed and are stored in a variety of conditions. Therefore, cleaning coins requires much more effort.

Coin cleaning is usually done by numismatists, since old Soviet cupronickel coins are very popular, but most of them are in terrible condition.

A similar situation is observed with jewelry: improper care and storage place cause a decrease in the attractiveness of jewelry. Cupronickel silver must be cleaned periodically to maintain the acceptable appearance of the jewelry.

Methods for cleaning cupronickel

Cleaning cupronickel silver from blackness at home can be done in several ways. The choice of method and product depends on the type of product and the degree of darkening. For cleaning, you can use cleaning products, abrasives or foil. Next, we’ll look at how to clean cupronickel and what you need to do it.

The result of cleaning cupronickel

Cleaning nickel silver items with foil

The use of foil can be combined with the use of soda and salt. It is necessary to place foil on the bottom of a pan or other similar vessel. Place the utensils on the foil and fill them with water so that it completely covers them. Using baking soda and salt will help get rid of stubborn dirt collected in micropores. You can add about three tablespoons of each substance.

Cleaning cupronickel using foil

Then you need to boil the water and keep it on the fire for about 20 minutes. High temperature will not affect the alloy of copper and nickel in any way, so there is no need to worry. After the required time has passed, the pan must be removed from the heat and left until it cools completely, without removing the utensils from the water.

After cooling, the cutlery can be removed from the water and rinsed under running water. It is very important to wipe the products dry with a dry towel. So that the evaporated moisture does not leave new stains.

Foil cleaning is a fairly effective solution and can also be used as part of a coin cleaning routine.

Using commercially produced cupronickel cleaners

The development of the chemical industry allows the use of special cleaning products made in the form of gels, solutions or powders. Such means are quite effective, allowing you to put in less effort and time than using folk remedies and methods.

The best way is to use liquid products and dry cloth. You can use special napkins pre-impregnated with the product in production. Abrasive cleaning powders are no less effective, but they can scratch the surface, so they are rarely used for cleaning cutlery.

Some products create a protective film on the metal surface. This film protects against repeated darkening and damage to products. Therefore, special gels are recommended to be used to restore the appearance of old cutlery.

Cleaning from darkening with vinegar and soda

Vinegar and baking soda are easy to find in any kitchen, so these products are primarily suitable for cleaning.

Soda is used in the form of a solution. For 1 liter of water you need to add 50 grams of baking soda. You can rub the devices with the resulting solution using a napkin, or rinse them in a container. After cleaning, the product must be rinsed in clean water and wiped dry.

Vinegar should be used in the same way. The solution is prepared by adding a teaspoon of vinegar to a glass of clean water.

Such products will not help cope with old dirt that has penetrated into the micropores of the alloy; however, it is perfect for periodically cleaning spoons. Its advantages are the simplicity and availability of cleaning products.

Preparing a decoction for cleaning cupronickel

At home, you can prepare decoctions based on various substances that can be used to clean cupronickel. Usually the base is eggshells, potatoes or garlic peels.

A decoction based on eggshells is quite an effective remedy that can correct even old stubborn stains. It is prepared by adding the shells of two eggs to one liter of boiling water. Cupronickel silver products should be immersed in boiling broth for several minutes. After this, they can be taken out and washed with running water.

A decoction of garlic peels is prepared in a similar way. The effectiveness of the product depends on the amount of husk. The duration of boiling spoons and forks depends on the degree and age of contamination.

Potato broth is the least effective, but is gentle on coatings. Therefore, it is recommended for use when cleaning products with gold or blackening.

The use of ammonia

A solution of ammonia is prepared by adding 2 tablespoons of alcohol to half a liter of water. Polishing cutlery with this solution can quickly remove old stains. You just need to wipe the forks or spoons with a sponge with the applied solution.

There are many other ways and methods for cleaning cupronickel, but the above are quite sufficient for quick and easy cleaning.

Tips for caring for nickel silver products

To ensure that cupronickel products do not have to be cleaned of significant contaminants that are difficult to clean, it is necessary to carry out preventive measures. Proper care and storage prevents the alloy from reacting with oxygen and water. It is this chemical reaction that causes darkening and staining.

Cupronickel should be stored in a dry place, protected from water and moisture.

After using the devices, they must be thoroughly washed using regular detergents. Additionally, you can use special gels to create a protective film. But you should absolutely not use products containing chlorine. It negatively affects the appearance of the metal, causing it to darken and lose its shine.

After thorough washing, cupronickel should be wiped dry. This will avoid stains and water reaction with the alloy. Proper care of cupronickel allows you to preserve its appearance for many years.

Source: https://moy-instrument.ru/masteru/kak-ochistit-melhiorovuyu-monetu.html

Ways to clean coins at home

An increasing number of people are showing interest in numismatics these days. The hunt for rare coins is gaining momentum. Unfortunately, almost any metal can be oxidized, which negatively affects the appearance of the product. Cleaning coins is the only way to deal with this problem. The tips given in the article will help you do this quickly and efficiently.

Cleaning coins: general recommendations

There are a large number of techniques that can be used to remove contaminants. Cleaning coins at home is a task that anyone can handle. Be sure to take into account the recommendations below.

• The cleaning method must be chosen depending on what alloy the affected specimen is made from. Otherwise, there is a danger of irreversibly damaging the coin rather than saving it.
• It is advisable to avoid products that contain abrasive particles. There is a high probability that their use will result in scratches on the surface of the coin.
• Cleaning coins with concentrated acids is also not recommended. First of all, this applies to copper specimens.
• Removing the patina may reduce the value of the coin. For some products it serves as decoration.
• It is advisable to check the selected product before the procedure. Experiments can be carried out on products that are made of similar material.

Silver

How to restore the original beauty of silver coins? Cleaning with a solution of ammonia and baking soda is an excellent choice.

• You need to dissolve two tablespoons of soda in a glass of hot water. You can also add a few drops of dish soap. The product is placed in the resulting mixture for approximately eight hours. The coin is then thoroughly washed and dried.
• In a glass of hot water you need to add 30 ml of hydrogen peroxide and a teaspoon of ammonia. The affected specimen must be kept in this solution for about 15 minutes. The mixture is then diluted and drained until the silver is in clean water. Next, the coin is thoroughly washed and wiped with a soft cloth.

If the choice is made in favor of the second method, extreme caution must be exercised. The coin must be turned over without removing it from the liquid. There is a possibility that an oxidation process will occur in air. In this case, the metal will be damaged.

Copper

How to clean copper coins at home? These products are famous for their capriciousness, so returning them to their original beauty must be done with care.

• Vaseline oil. The affected specimen must be boiled in it until the contaminants disappear. The final part of the work is to rinse the coin in alcohol and dry it with a soft cloth.
• Hydrogen peroxide. This product will help restore the lost shine to the product. Dissolve 30 ml of peroxide in 200 ml of water, and then add a teaspoon of ammonia. The coin should be kept in this mixture for no more than 15 minutes.
• Neutral soap (laundry, baby). It must be grated on a coarse grater. The resulting porridge should be coated on both sides of the damaged specimen. The product will have to be left in this form for a long time, which is the main disadvantage of this gentle method of cleaning copper coins. From time to time it is necessary to remove the specimen and clean it under running water with a soft brush. This will remove softened contaminants. The procedure continues until the desired result is achieved.

Bimetallic

When creating some coins, for example, commemorative coins, two different metals are used. The central part is made of silver or steel, and gold, copper or various alloys are used for the edging. How to clean such a product?

• Dishwashing liquid. You can use, for example, “Fairy”. Dissolve one tablespoon of the product in a liter of water and mix thoroughly. The coins are kept in the liquid for about an hour, then removed and wiped with a flannel rag. Dishwashing detergent shows excellent results when dealing with minor stains.
• Toothpaste. Apply a pea-sized amount of regular paste to a soft-bristled brush. The affected specimen must be rubbed carefully; strong pressure is not required. Cleaning coins ends with rinsing in water.
• Paste GOI. This product includes small abrasive particles, which allows it to effectively combat dirt and oxides. The paste should only be used for inexpensive coins, as there is still a danger of damaging the product.
• Formic acid. This product will help restore the specimen to its original shine. You need to immerse the coin that needs cleaning in a 14% solution for about five minutes, and then polish it. Instead of formic acid, it is allowed to use alcohol.

Cupronickel is also capable of oxidizing and turning black, and has a similar composition to noble metals. The methods discussed below are suitable for cleaning coins at home.

• Ash. With its help, you can quickly and effectively rid the product of patina. The affected specimen is dipped in water, then cigarette ash is applied to it. After about 20 minutes, the coin needs to be rinsed.
• Dish powder. This product is applied to the product after wetting it with water. It is necessary to treat the surface of the damaged specimen with a sponge and wait for some time. The coin is then washed in water.

Brass

What product should I use to clean coins made from a copper-zinc alloy? Such money is not particularly susceptible to corrosion, but still needs cleaning from time to time.

• Oxalic acid. This product can be purchased in a store. With its help it is easy to remove plaque, it shows good results even in the fight against old stains. The coins need to be immersed in acid for about ten minutes. Be sure to thoroughly rinse the money with water after finishing the cleaning procedure.
• Trilon-B. This product must be dissolved in clean water, maintaining a ratio of 1 to 10. Then the coin is dipped into the resulting solution. She shouldn't be there all the time. From time to time, the specimen must be washed in running water and inspected. Soaking is repeated until the desired result is achieved.
• Other means. What other methods of cleaning copper-zinc alloy coins are there? Citric acid, Coca-Cola, and a thick soap solution will help restore your products to their original beauty.

Aluminum bronze

Which tools should be preferred in this case? Coins made from this material can be cleaned using the same methods that are suitable for copper coins. There are other effective methods.

• Coca Cola. This popular drink is not only drinkable, it has also gained a reputation as a good stain remover. The main disadvantage of this method is the long wait for the result. You will have to keep the coins in a glass of Coca-Cola for about a week. Then they must be rinsed with clean water.
• Plumbing cleaner. The affected specimen must be immersed in such a solution for no more than a couple of minutes. It is then cleaned using running water.

USSR anniversary coins

There are specimens that need special care. For example, how to restore the lost attractiveness of USSR commemorative coins at home? Cleaning in this case is done using an ordinary eraser. This must be done carefully so as not to damage the drawing.

You need to rub the dry surface with an elastic band until the plaque disappears. This method is suitable for adding shine to any alloy products.

Universal remedy

What methods are suitable for bringing any coins back to normal? There is a universal remedy that contains several ingredients. It will help cope with rust, green deposits and other oxides.

• You need to mix 25 ml of soda and soap solution. 25 ml of ammonia and 75 ml of toothpaste are added to the resulting mixture.
• All specimens that need to be cleaned must be immersed in the finished product. There they remain until the goal is achieved. Periodically, coins should be removed, wiped with a toothbrush and inspected. At the end of the procedure they are washed with water.

Working with electrical devices requires knowledge of safety precautions. We also must not forget that their use significantly increases the likelihood of damage to specimens. Cleaning coins by electrolysis is carried out in a well-ventilated and lit area. You should definitely take care to protect your hands and eyes.

• You need to prepare a power supply with a voltage of 6-12 V. Next, the plugs are cut off and the wires are cut into two parts. Then you should clean the ends and attach the copper wires to the clamps.
• The plastic container is filled with saline solution. It is easy to prepare by placing a tablespoon of salt in a liter of water.
• The power supply is connected to the network, the clamps are lowered into the resulting solution. The “+” terminal should be connected to the coin, on which a hissing sound will be heard. The entire procedure will take no more than ten minutes.

Vinegar

What other methods can be used? Vinegar is a product that is suitable for bringing inexpensive specimens into proper shape. It must be remembered that the solution can corrode the surface of the product and change its color. In addition, it is believed that after such a procedure the coin will deteriorate faster.

• Any specimen that needs cleaning can be immersed in a solution of 10% vinegar for a day. This is the easiest way.
• You can also prepare a mixture of vinegar and salt. Approximately 5 g of salt must be mixed with a quarter tablespoon of vinegar. You need to stir the mixture until the salt dissolves. Then coins are dropped into the resulting solution. This must be done so that the copies lie separately from each other. Products are soaked in the solution for no more than five minutes. If dirt remains, you can further treat them with a brush. Next, the specimens should be carefully washed in running water.

Cleaning coins with vinegar is a dangerous choice. Its use can negatively affect the appearance and condition of products made of silver, copper, aluminum, and lead.

Mechanical restoration

What other options are available? Mechanical cleaning of coins is used to remove surface deposits. We can talk about sand, earth, individual tubercles of corrosion.

To carry out the procedure, various brushes are required (brass, bristle, glass fiber). You will also need dental burs of different sizes and scalpels. These devices must be used with the utmost caution.

If used improperly, there is a danger of causing scratches that will distort images, inscriptions, and so on.

• The damaged specimen must be kept in distilled water for about an hour. This is necessary in order to desalt the product and get rid of dried dirt.
• Next comes the impregnation of the coin with synthetic resin. This is required to strengthen the noble patina and prevent damage.
• Then you can proceed directly to cleaning the instruments. This work is very painstaking and time-consuming; it will require a huge amount of patience. The master can clean some instances within a month or two.

Mechanical cleaning is a method that is more suitable for professionals. Hobbyists risk hopelessly damaging the coin. Therefore, it is recommended to develop appropriate skills on specimens that are not of particular value.

Source: https://FB.ru/article/62898/kak-delaetsya-chistka-monet

How to clean coins - the best methods from experienced numismatists

According to statistics, many people of different ages are interested in numismatics, which makes them “hunt” for rare coins. Almost any metal can oxidize over time, which affects its appearance. In this case, information on how to clean coins will be very useful.

Cleaning coins at home

There are a huge number of techniques used to remove various contaminants from coins. They are used by both collectors and people searching for treasures. It is important to consider a number of tips on how to clean old coins at home:

1. You should choose a cleaning method based on the alloy from which the contaminated specimen is made. The thing is that some products can provoke reactions that will ruin the coins. Do not use compounds with large abrasive particles, as they will leave scratches on the surface.
2. It is not recommended to clean coins with concentrated acids. This is especially true for specimens made of copper.
3. Please note that for some coins the presence of patina is a decoration that gives a noble appearance and its removal will lead to a decrease in value.
4. When describing how to properly clean coins, it is worth pointing out that before carrying out the procedure, it is recommended to test the selected product on less valuable items made from similar material.

How to clean silver coins?

To clean precious coins, you can use baking soda and ammonia solution. If these methods fail, then you can use formic acid, which can remove dirt if heated to 70°C. This product will help remove rust and other contaminants. When figuring out how to clean a silver coin, it is worth pointing out that there is a product - Silbertauschbader, which is used by specialists to clean silver items.

Cleaning Copper Coins

Copper products are considered the most capricious, so you should be careful when choosing the appropriate method. The most popular options are based on the use of vinegar and soap. These methods are described below, and also cleaning copper coins from greenery can be done as follows:

1. Vaseline oil. It is necessary to boil the products in this product until the contaminants disappear. At the end of the procedure, rinse them in alcohol and wipe with a cloth.
2. Hydrogen peroxide. To make coins shiny, it is recommended to mix 30 ml of hydrogen peroxide, a small spoon of ammonia and 200 ml of water. Place coins in the solution for 15 minutes. and wipe with a soft cloth.

How to clean bimetallic coins?

When making coins, for example, commemorative coins, two different metals are used: steel or silver is used for the central part, and copper, gold or various alloys are used for the edging. There are simple ways to clean coins at home:

1. Detergent. The popular dishwashing detergent “Fairy” gives good results for minor stains; you need to mix 1 tbsp in 1 liter of water. spoon. Place coins in the prepared solution for an hour, and then wipe with a flannel cloth.
2. Toothpaste. Squeeze a pea of ​​regular paste onto a soft-bristle brush and rub the coin with it without pressing. Cleaning bimetallic coins ends with rinsing in water. There are reviews that after some time the surface may become dull, and to give the product shine, put it on for 5 minutes. in a solution of formic acid 14% or alcohol. At the end of the procedure, polish the coin.
3. Paste GOI. This product contains small abrasive particles that can remove dirt and oxides. It is better to use paste for inexpensive coins. You can clean with a brush, but it is better to use a mechanical engraver with a felt attachment. The speed should be set to 10-15 thousand per minute.

How to clean cupronickel coins?

Cupronickel alloy is very similar to noble metals, and it also blackens and oxidizes. You can use different methods to add shine, and for those who are interested in how to clean old coins, the following methods are offered:

1. Dish powder. To remove dirt, you must first moisten the coin in water, and then apply powder to it. All that remains is to rub the surface with a sponge and leave everything for a while and rinse in water. Wear gloves before performing the procedure.
2. Ash. Continuing to explain how to clean old coins, we should mention an unusual method for removing patina. It involves the use of cigarette ashes. First, dip a coin in water and apply ash to it. Leave everything for 20 minutes, and then rub the pulp into a coin and rinse.

How to clean brass coins?

Money made from a copper-zinc alloy is not particularly susceptible to corrosion, but cleaning may be necessary from time to time. If you are interested in how to clean brass coins at home, then you should know that the following products will be effective: thick soap solution, citric acid and Coca-Cola. In addition, you can use the following options:

1. Oxalic acid. You can buy a product in the store that will quickly remove plaque. It is necessary to immerse the coins for 5-10 minutes, then they must be washed in water.
2. Trilon-B. Dissolve this product in warm water, taking into account the proportion of 1:10. Dip a coin into the solution and periodically rinse it under running water and check its condition. If necessary, soaking is repeated.

Cleaning Aluminum Bronze Coins

Products made from this material can be cleaned using the options described for copper coins. There are several more methods for cleaning old coins at home:

1. Coca Cola. A good solvent for stains is a popular drink, which should be poured over the products and left for a week. After the allotted time, rinse the coins in water, and the result will be incredible.
2. Bathroom cleaner. Coins need to be dipped into the solution for just a couple of minutes and then rinsed.

There are several methods for cleaning coins using readily available products that you can find around your home. Through experimentation, you can choose the most effective option for yourself. There is a universal coin cleaner that includes several ingredients. With its help you can remove green deposits, rust and other oxides:

1. Mix 25 ml of soap and soda solution and add 75 ml of toothpaste and 25 ml of ammonia.
2. Dip all the coins into the prepared product and leave them there until completely cleaned. From time to time, take them out and rub them with a toothbrush to evaluate the result. Finally, rinse the coins with water.

Cleaning coins by electrolysis

To carry out the procedure, you will need electrical devices, so it is important to consider safety regulations. When describing how to clean Soviet coins, it is worth noting that when using electrolysis, the risk of damaging the product increases significantly. The procedure must be carried out in a well-lit and ventilated room. Be sure to protect your hands and eyes. There are instructions on how to clean coins by electrolysis:

1. Prepare a power supply with a voltage of 6-12 V. Cut off the plugs and cut the wires into two parts. Clean the ends and attach the copper wires to the clamps.
2. Take a plastic container and fill it with saline solution, combining 1 liter of water with 1 tbsp. spoon of salt.
3. Connect the power supply to the network and lower the clamps into the saline solution. A hiss will be heard at the “+” terminal and should be connected to a coin. The cleaning process will take approximately 10 minutes.

Cleaning coins with ammonia

To deal with copper oxides, it is necessary to use chemical cleaning methods. For example, you can use a 5-15% ammonia solution, which is popularly called ammonia. Please note that this product has a strong odor, so use it carefully. There are several features of how to clean a coin until it shines in ammonia:

1. Pour the product into a plastic container and place coins in it, which should be turned periodically. Please note that you cannot take them out right away, as the product may become damaged.
2. When cleaning is completed, it is necessary to pour water into the ammonia, thereby reducing the concentration. Only when the solution is weak can you take out the coins and rinse them under running water.

Cleaning coins with soap

One of the simplest methods, which has been used for decades, involves the use of laundry soap. It not only removes dirt well, but is also safe for the product. When figuring out what you can use to clean coins, it is worth considering the instructions for using soap:

1. Pour boiling water into a plastic container and rub in 70% laundry soap. Close the container and leave until the mixture reaches a thick consistency.
2. After this, add coins to the resulting mass and leave them for two days. Once the time is up, take them out and clean them using a soft toothbrush. If any dirt remains, the procedure can be repeated.

Cleaning coins with citric acid

You can clean coins and save money with citric acid. It removes dirt and makes coins shine as if they were just minted. Please note that the prepared solution can be aggressive towards metal, so it is important to constantly monitor the process. Cleaning copper and silver coins occurs differently. When using copper products, consider:

1. Pour citric acid into a plastic container and pour in water. You can choose the concentration of the solution yourself, taking into account the degree of contamination.
2. Stir the solution until the acid is completely dissolved and place coins in it. When one side is peeled, flip to the other side.
3. During the procedure, citric acid also removes the patina, which you can restore yourself if you wish. It is necessary to place the cleaned coins on the back of the ventilation grill in the kitchen for several days.

Another will be instructions on how to clean coins with citric acid if they are made of silver:

1. Pour 200 ml of warm water into a plastic container and add 2 teaspoons of citric acid. Stir until dissolved.
2. Dip the coins into the solution for 10 minutes, and then remove them and wipe them with a toothbrush. It is important not to leave them in the solution for a long time.

Can you clean coins with vinegar?

If the coins are not particularly valuable, then you can use a vinegar solution, which may discolor or corrode the surface. In addition, there is an opinion that after such cleaning the products will deteriorate more. You can simply put coins in a 10% vinegar solution for a day, but there is another way. When describing how to clean an ancient coin, you should suggest an option using a solution of vinegar and salt:

1. Take 1/4 tbsp. vinegar and add 5 g of salt. If there are a lot of coins, then use 0.5 tbsp. vinegar and 15 g of salt. Stir until the salt is completely dissolved. Place coins in the solution so that they lie separately from each other. Soaking duration – 5 minutes. If some dirt does not come off, then brush the coins again. All that remains is to rinse them in strong water.

Cleaning coins with baking soda

An effective method is the alkaline cleaning method, which is suitable for copper and silver coins. For those who are interested in how to clean coins with soda, you should know that there are two ways:

1. Mechanical cleaning of coins involves creating a paste at the first stage, for which add a little water to a spoon of soda. Apply the resulting mixture to the coin, then remove dirt using a soft brush. Baking soda can be used after acid cleaning to quench the reaction.
2. To get a good result, you can combine cleaning with a solution of soap and soda. After cleaning, lubricate the surface with alcohol and petroleum jelly.

Source: https://womanadvice.ru/kak-chistit-monety-luchshie-sposoby-ot-opytnyh-numizmatov

How to Clean Copper Coins at Home: Working Methods

The peculiarity of copper coins is their tendency to become heavily soiled over time. Copper can turn black and oxidize, and a white, green or blue coating may form on it. It is important to know how to clean copper coins at home without damaging them.

Ammonia

Pour ammonia into a plastic or glass container and place a copper coin in it for 10 seconds. After this, remove and rinse with warm water. If you keep the coin for longer than expected, it may turn yellow.

Laundry soap

This cleaning method takes quite a long time. For it, you will need to grate laundry soap and dilute it with water to a paste. Dip contaminated coins into the soap and leave there until a dark coating appears on the surface. Take them out and scrub them with a brush to completely remove plaque. Then rinse under running water. Repeat the procedure until the coins are completely clean.

Kefir

To clean a copper coin using kefir? Just fill it with this product for several hours. Over time, plaque that has come away from the coin will appear on the surface. Then take it out and wipe it dry with a hard cloth. If not all dirt has come off, you can remove it with a toothpick.

Toothpaste

This cleaning method is faster than the previous one. Take a copper coin, rub it with toothpaste and leave it for 1-2 hours. Then moisten a little with water and scrub thoroughly with a brush. Contaminants should be completely removed. If stains remain, repeat the procedure. After finishing, wipe the coin dry with a soft cloth.

Acetic and citric acid

Cleaning coins with acetic acid will take no more than an hour. Take 1 liter of table vinegar and add 3 tbsp. l. sea ​​salt. Place the solution on the stove and place the contaminated coins in it. Wait until it boils and turn off. Remove the coins after the liquid has cooled. Finally, scrub them with a soft brush and rinse them in water.

You can also clean copper coins using lemon. It is enough to cut it in half and insert coins into the pulp for half an hour. After the time has passed, remove the coins, brush them and rinse them with water.

Salt

You need to be careful with this method, because salt acts not only chemically, but also as an abrasive. This may damage the coin. Take 1 tsp. salt, 1 tbsp. l. any flour and a few drops of vinegar. Mix this mixture thoroughly and rub the coin. Then leave it in this mixture for 15-20 minutes. Then rinse the coin under running water.

Vaseline oil

Pour the oil into a metal bowl and place it on the stove, place the coins there. Bring the oil to a boil over low heat and leave for 10 minutes. At the same time, cover the container with a lid and open the window. Most likely, an unpleasant odor and soot will appear. Let the oil cool and remove the coins. Rinse them in soapy water and brush them if necessary.

If you use the above methods, you can cope with cleaning copper coins without spending extra money.

Source: https://ymadam.net/dom/khozyajke-na-zametku/ochistit-mednye-monety.php

Cleaning coins with vinegar

One of the chemical ways to remove dirt and oxides from coins is to clean them with table vinegar, acetic acid or essence.

Regarding this method, the opinions of professional numismatists differ - some consider vinegar to be an acceptable and good cleaning agent, while others are categorically against it, believing that such treatment destroys the top layer of the coin and changes its color.

We advise you not to use it on coins of collectible value, but rather contact cleaning specialists.

It makes sense to dry-clean coins if they have been damaged due to improper storage, dug up from the ground, the bottom of a reservoir, etc.

If the objects were in a dry and calm environment, then they are most likely covered with patina and slight dirt, which can be removed with soap, water and alcohol. If you still want to practice, then you need to choose cheap everyday coins.

Below are tips from numismatic forums on how to clean coins with vinegar without damaging them or with the least damage.

Methods and recommendations for using vinegar for cleaning

The vinegar cleaning method is safer for coins made of hard metals, bronze, and steel. Can be used on royal copper coins (very carefully), Soviet and modern coins, low-grade silver. It is strongly recommended not to use on aluminum coins or on surfaces with remaining stamp shine (it will be gone after cleaning). Before you begin the process, prepare:

• 9% table vinegar / acid / essence
• containers for soaking (for each coin)
• toothbrush
• tweezers
• toothpicks
• paper, cotton napkins.

Before immersing coins in vinegar, they should be washed under running cold water or soaked in warm water, and then wash off the dirt from the surface with a brush. To avoid harm, the products are dipped in 9% vinegar one piece at a time, starting from 1-5 minutes, cleaning the plaque and assessing the result. On coins in good condition, the green coating will quickly be removed, but on surfaces in poor or average condition, the green will go away along with the patina and design. Silver coins can be aged longer.

A longer method, and therefore gentle, is to use a very weak vinegar solution of 0.5-1%. It is recommended to monitor the process every 15 minutes, and after half an hour to an hour, rinse it under water with your fingers or a soft toothbrush without pressure. If necessary, you can use toothpicks for cleaning.

Usually 3-6 hours are enough, but the process can take up to several days, weeks, or months. If you need to go away and there is no way to monitor the cleaning, the coins are washed and transferred to a container with alcohol.

If everything is done correctly, then a good result is obtained, the patina is preserved and additional processing for finishing, painting and color leveling is not necessary.

How to properly rinse and dry coins after cleaning

After cleaning with any chemical, it is better to prevent coins from coming into contact with air. The coin is not pulled out of the solution, but is spilled with water until the aggressive agent is completely washed out of the container. Specifically, you can get rid of vinegar under running cool water. You can also neutralize acetic acid with regular soda by rinsing the coin in its solution.

A coin that has been thoroughly washed in clean water must be dried well with a soft natural cloth and placed on a paper towel. Improper drying or lack thereof can ruin even the best cleaning of coins until they shine. The appearance and safety of the specimen will largely depend on how it was dried.

Conclusion

It is almost impossible to determine the condition of the surface and design from an uncleaned coin. Therefore, after processing, the result can be either good or bad. After any chemical cleaning, stains, dots and streaks of different colors often remain on the surface.

In each specific case, decisions on them are made individually. Some of them are normal for the coin and do not need to be removed, as this may lead to the discovery of pure metal.

If you overdo it with cleaning and deprive the coin of the most valuable thing - patina, then it will lose its authenticity.

https://www.youtube.com/watch?v=5DJqg6ljJf0

What to train on. Experienced numismatists advise starting with kopeck pieces and nickels of Catherine 2. The relief design on them is high, the copper is good, and you quickly gain the necessary experience for cleaning complex coins. Then you can switch to Nicholas Copper 2 (latest releases). Shallow terrain provides excellent potential experience. All the nuances of cleaning are revealed in the process of gaining experience.

CAREFULLY!!! If you are the owner of a rare and expensive coin, or you need to remove a pinpoint stain, contact a professional. Search on forums or among colleagues in the club. But, as experienced numismatists advise, it is better not to touch such specimens at all.

Source: https://xn--80aknalggeqsd.xn--p1ai/%D0%BE%D1%87%D0%B8%D1%81%D1%82%D0%BA%D0%B0-%D0%BC% D0%BE%D0%BD%D0%B5%D1%82-%D1%83%D0%BA%D1%81%D1%83%D1%81%D0%BE%D0%BC/