How to remove green deposits on copper products

How to clean copper at home: ways to clean copper products with different means

How to clean copper? The relevance of this issue is explained by the fact that products made from this metal have been used by humanity for many centuries. For a long time, the value of this metal was so high that it was equal to gold. The development of technology has led to the fact that it was possible to significantly reduce the cost of copper production.

This made it possible to make not only jewelry from this metal, but also dishes and interior items. The high popularity of this metal and alloys based on it is explained not only by its decorative effect, but also by its unique characteristics - high ductility, thermal conductivity, corrosion resistance, etc.

No one wants to use oxidized copper cookware.

Why copper products need to be cleaned regularly

During use and storage, copper products become covered with a dark or green coating. The oxide film is formed as a result of the interaction of the metal with atmospheric oxygen. Heating or using the item outdoors or in rooms with high humidity accelerates plaque formation. At the same time, dishes and decorations lose their appearance and look untidy. In the sailing fleet, most of the metal parts of the ship were made of copper, and there was even such an expression as “scrubbing a piece of copper.”

In addition, the chemical compounds that make up plaque can have harmful effects on human health. Therefore, copper products must be cleaned regularly.

Copper oxidation

Since ancient times, people have been improving cleaning methods, using both mechanical and chemical methods.

Cleaning a Turk, samovar or kettle

The exterior of this kitchen utensil can be cleaned using any of the suggested methods. The inside is much more difficult to clean. There, objects are oxidized by water, but also covered with a lime layer.

To remove dirt from the inside, potato peelings are used. They are placed in a bowl and poured over with boiling water. Then set the utensils on the fire and boil the cleaning for an hour. Then the contents are poured out, and the utensils themselves are washed in heated water with detergent.

To complete the cleansing, boil plain water several times in a cleaned container. This gets rid of traces of limescale.

Effective cleaning methods

Today, the arsenal of tools that can be used to clean copper has expanded significantly. Together with ancient vinegar, sand and wire sponges, a large number of both specially designed products and those adapted by folk craftsmen are used. Among the latter there are some quite unexpected ones.

How to clean copper

• Tomato ketchup. Apply a small amount of tasty seasoning to the stain and leave for several minutes. Rinse off with plenty of water.
• In case of light stains, you can try washing them with a regular gel detergent. The gel is squeezed onto a soft sponge and then applied to a copper object. After leaving for a minute, rub the surface and rinse with water.
• Used for large products, such as a samovar. Cut the lemon in half and rub the half over the surface of the product. Next, clean with an elastic fluffy brush and rinse with water.
• Vinegar dough. Mix vinegar and regular table flour in equal parts. Stir until a homogeneous paste-like mass is obtained. Next, the paste is spread in a thin layer on the surface to be cleaned. After waiting for complete drying, remove the product with a rag or wooden spatula. The product must then be polished with a soft cloth.

If the above methods do not lead to success, use the following method:

• Prepare a stainless steel basin or pan.
• Pour vinegar and add a couple of tablespoons of regular table salt. Stir thoroughly.
• Immerse the item to be cleaned in the solution and bring to a boil.
• Remove from heat and leave to cool at room temperature.
• Drain the cooled solution, rinse the copper object and wipe dry.

Cleaning copper with vinegar

If you decide to clean copper, take precautions. The use of protective gloves and glasses is mandatory. If you dilute vinegar essence, you should ensure ventilation of the room.

Effectively cleaning copper coins

Previously, small coins were made from a copper alloy. Today they are considered a rarity. Since a film often forms on the surface of coins, this reduces their value. To remove oxidation and return items to their original appearance, antique dealers use industrial cleaning products. With their help, you can not only return coins to their original condition, but also clean a copper pot or an antique basin.

Ways to clean copper at home:

1. A pronounced yellow coating on coins indicates contact of the products with a lead surface. Such items can be treated with acetic acid solution.
2. Citric acid powder will help remove the bright green film.
3. Remove red deposits with a liquid containing ammonia.

Before cleaning a copper basin, dishes or coins that are considered rare, you need to study the recommended treatment time and the amount of active substance. If you overexpose a copper object in Trilon, acid, or rub it with sulfur ointment in excess, you can ruin antique items.

Boiling coins in soda solution

Baking soda and copper interact effectively with each other, returning the shine to metal products. To prepare the solution, take 1 liter of water and 10 tbsp. l. baking soda. You will also need a small saucepan and an old toothbrush.

The solution should be poured into a container and the products should be lowered into it. They should be covered with at least 2 cm of the solution. Place the pan on the fire and boil the contents for 20-30 minutes. Then you need to let the coins cool. Already cold products are treated with a toothbrush, removing remaining dirt.

Trilon B

Trilon B is another option for processing copper at home. This is a ready-made chemical mixture that is sold in jewelry stores. It is designed specifically for copper surfaces, does not destroy the metal, like some acids, and carefully cleans it of oxide.

Metal products are placed directly into a jar of the substance using plastic tweezers for 10-20 minutes. Then they are taken out and washed. If the oxide layer is too thick, the procedure will have to be repeated several times.

Kefir, vegetable oil

Kefir contains non-aggressive acids that gently clean the copper surface, leaving a light patina. To carry out the manipulation, all items should be placed in glass containers and filled with fermented milk product. Keep copper products in kefir for 50-60 minutes. Then you need to take them out, wash them under running water and dry them.

When using vegetable oil, you need to additionally take dishwashing detergent, a deep saucepan and plastic tweezers. Pour sunflower or olive oil up to 2 cm high into the bottom of the container and boil. Using tweezers, lower the coins into the pan and keep them on the fire for 10-20 minutes. Then remove the copper products, rinse with dishwashing detergent, wipe and dry.

Citric acid, vinegar

Dark stains on ancient coins can be easily removed with vinegar. First, prepare a solution with 0.5 liters of water, 1.5 tbsp. l. 9% vinegar and 1.5 tbsp. l. rock salt. Copper objects are dipped into the liquid and sent to the fire. It is advisable to boil the coins for 5-10 minutes, then remove them, rinse and wipe dry with cotton cloth.

If desired, vinegar can be replaced with citric acid or freshly squeezed juice. If lemon is used, the fruit should be cut in half and the pulp should be rubbed onto the copperware. Leave them in this state for 10-15 minutes, then rinse under running water.

Cleaning copper at home

Copper utensils and jewelry should be cleaned regularly. With regular care, copper cleaning is carried out by regular washing or wiping with kitchen or sanitary gel. If plaque covers a significant area and cannot be removed by simple means, more radical cleaning methods are used.

How else can you clean copper?

• Citric acid powder is diluted at the rate of a tablespoon of acid per liter of water. Add a teaspoon of table salt and stir thoroughly. Use the resulting solution to wipe away plaque stains using a sponge or cloth. The method is convenient for items that do not fit in the sink: large figurines, door and window fittings, samovars, teapots, etc.
• Black deposits should be cleaned with ammonia. If you have to clean dishes, be sure to thoroughly rinse the utensils with plenty of water. If ammonia enters the human body, it can lead to serious poisoning. In the case when individual stains merge into a continuous layer of plaque, it is better to soak the entire product for one to three minutes.
• It is better to clean red stains with an ammonia solution with a strength of no higher than 10%. Carefully! Ammonia is poisonous. Be sure to provide adequate ventilation.
• It is good to clean yellow and black stains with a mixture based on regular 9% vinegar. To one part vinegar, take one part salt and two parts water. Immerse the item to be cleaned in the tank with the solution and bring the mixture to a boil. Carefully monitor the disappearance of stains - as soon as they have dissolved, stop boiling and allow the tank to cool. Next, the product should be rinsed with plenty of water and wiped dry.

Before you begin cleaning the entire copper item from oxides, you should test the effect of the cleaning composition in an inconspicuous place or in a small area.

If the product is effective and does not damage the surface, you can clean the entire product.

What is copper?

Copper is a ductile, but at the same time durable metal of a reddish-brown color. It is one of the main elements of the periodic table. The copper-based alloy is used to make other metals such as bronze and brass.

The scope of application of this metal is extremely wide. Due to its strength, it is in great demand in construction for the manufacture of wires, fittings, copper mesh, wires and other things. In the agricultural industry, copper is used as part of copper sulfate. Most wind musical instruments are made from copper. This metal is also widely used in the creation of plumbing pipes.

Despite the fact that copper is not a precious metal, it is also in demand in jewelry. You can find a lot of beautiful and very elegant copper jewelry: bracelets, crosses, chains, earrings, rings, etc. Also, to make gold jewelry more durable, an admixture of copper is used.

Copper cezves (Turks) have long become a popular accessory for lovers of delicious coffee.

Products made from this metal can often be found in the kitchen. Due to its resistance to corrosion and good heat conductivity, copper is used to make a huge variety of kitchen utensils: , etc.

Source: https://instanko.ru/drugoe/chem-chistit-med.html

How to remove green deposits from copper

Metal etching sometimes replaces casting and engraving; it makes the whole process much simpler. You can get a design that is both concave - relief, and convex - bas-relief.

Metal etching at home can be chemical or galvanic.

The first option is more toxic when used at home, so for starters we will use the second, it is also called electrochemical.

Equipment

You need to take a power supply or transformer that can output from 4 to 7 V.

In addition, you will need a dielectric bath; it must contain the necessary part and a second metal object that is connected to the anode.

To etch a pattern on metal, it is necessary to use a solution of ferrous sulfate as an electrolyte.

If the design is needed on a copper or brass surface, then use copper sulfate. You can also use ferric chloride.

The main thing is that the water is distilled.

In order for the etching to be uniform and in the right places, the part must be cleaned of dirt and also degreased. For more convenient work, copper wire is soldered onto the part with tin; it will be convenient to hold the object by it.

To clean the surface, you need to dip the object to be converted into 10% sodium hydroxide, the temperature of which is 50°C, then into a 15% sulfuric acid solution and hold it there for two minutes, then rinse it in hot water.

When the procedure is completed, the surfaces of the object will be completely cleaned, and of course, you cannot touch them with your hands.

Electrochemical etching of metal

We need to protect areas that should not be etched. To do this, you need to apply a special mastic to these surface areas. It is made from three parts of wax and two parts of rosin, they are melted in a tin can, stirring.

After everything turns into a homogeneous mass, it is allowed to cool and divided into fragments.

Each of them is placed in gauze so that later, when pressed, as much mastic as necessary can seep through it.

After this, the workpiece that we will etch heats up.

Now we take the created mixture, which was placed in gauze, and rub the surface with an even layer.

After cooling, the mastic becomes hard. The top is coated with light water-soluble paint. This can be watercolor or gouache white. After which the coating should dry.

Then you can apply the design; it will stick well to the paint. It can be depicted using a pencil or translated using carbon paper.

Then this outline needs to be scratched with a needle all the way to the metal.

Now the etching of the metal by electrolysis begins, we connect one rod to the anode - plus, the other to the cathode - minus.

We connect the part on which the image will be applied to the first, and any steel plate to the second.

After this, the process of etching the metal begins where the image was scratched.

If you need to create a multi-level drawing, everything is done in the same way as described above.

Only the contours are checked each time, and when the smallest of them have been etched to the required depth, the part is removed and painted over with heated mastic using a brush.

In this way, metal is etched at home, after which the surface is washed with turpentine and then polished, giving the product a finished look.

Chemical etching

Now let's look at how to create a pattern on a metal surface without the use of electrical devices.

To do this, we need chemicals that are freely sold in hardware stores. So, let's begin.

For etching we need:

• "White Spirit";
• paint that does not dissolve in White Spirit;
• acetone;
• resin, which is used to cover roofs;
• table salt;
• copper sulfate.

Cleaning the part

To begin with, the part where the image is planned is cleaned with fine sandpaper and degreased.

When the surface is ready, you need to seal the place where the design will be applied with adhesive tape or something similar.

After this, the entire remaining surface, where chemical etching should not affect the metal, is painted over. It can be of any color, as long as it is resistant to White Spirit.

Once the paint is dry, you can remove the adhesive tape. Beneath it is clean metal, ready to create a design on it.

Now you need to apply an image onto this “mini-canvas”. It is made using resin, which is dissolved in White Spirit until it becomes liquid, like paint.

Use it to paint the desired image using a brush.

What’s good about this kind of improvised paint is that if something doesn’t work out in the drawing, you can remove it by moistening a cloth or cotton swab in White Spirit. If there are very small details in the drawing that did not turn out well with a brush, they can be corrected with a needle, scraping off the excess after drying.

In this way, you can etch a knife, keys, in general, any metal object. Now that the drawing is completely ready, you can begin the etching itself.

Source: https://steelfactoryrus.com/kak-ubrat-zelenyy-nalet-s-medi/

How to clean copper at home from green and black to make it shine

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Copper has long been used to make dishes, jewelry and many other household items. In this article we will talk about how to clean copper and how to properly care for copper products.

Copper cookware is valued for its strength, durability and good thermal conductivity.

If improperly or irregularly cared for, items made from this metal may lose their shine, oxidize, darken, or become covered with a green coating. We'll tell you how to avoid these troubles.

Basic rules for caring for copper products

By following these simple guidelines, you can keep your copper items looking beautiful:

1. If you use copper cookware, always keep it clean . After each use, thoroughly clean and dry the product .
2. When using copper utensils, it is not allowed to clean them with abrasives, compounds based on chlorine, ammonia and other aggressive components. Also, do not clean copper cookware with hard brushes or scrapers. These products may damage the metal surface.
3. For the same reason, you should refrain from using metal spoons and spatulas, giving preference to utensils made of wood, plastic or silicone.
4. If you wear copper jewelry, try to wipe it with a damp cloth after each wear. This way you will remove sebum and dust from the metal surface and can avoid serious contamination. Remember to dry the items with a soft cloth such as velvet or flannel.
5. It is recommended to store copper jewelry in separate boxes, wrapping each of them with a piece of soft material. Direct sunlight on decorations and their proximity to heating devices is not allowed.
6. For better preservation, it is recommended to coat the products with a layer of special varnish for metal surfaces. Check the coverage from time to time and update it. This way, you are guaranteed to protect your favorite item from plaque and stains that are difficult to remove, and will help your jewelry look great.

Copper jewelry always attracts attention with its unusual appearance and original shine. If you are going to wear copper products often, we recommend varnishing them

If you follow these simple tips, you can significantly extend the life of copper items.

Remember that copper cookware should not be washed in the dishwasher. Hand washing and cleaning are recommended.

Cleaning methods

If contamination cannot be avoided, we suggest that you familiarize yourself with effective cleaning methods.

Dishwashing liquid (to freshen)

This method is the simplest and is suitable for cleaning off minor dirt and refreshing the product. You will need:

• dishwashing liquid;
• pelvis;
• soft sponge.

Fill a basin with warm water and add a few drops of detergent. Lather well. Place the product in the resulting soap solution and leave for a while. Then take a sponge and remove the soaked dirt from the surface of the metal. Upon completion of the procedure, rinse the item thoroughly under running water and wipe dry.

Citric acid (from green plaque)

This method will help you cope with the greenish coating. You will need:

• lemon acid;
• warm water (preferably distilled).

First, prepare a 10% solution of citric acid: mix 10 g of powder with 100 g of warm water. Place a copper product in the solution and watch it: you will see how the greenery will separate from the surface of the metal and color the liquid green. Once all the plaque has been dissolved, remove the product and rinse thoroughly under running water.

If you don’t have citric acid on hand, rub half a lemon on the surface of the metal and leave for a while. Then rinse the product.

You can remove cloudy deposits and refresh copper items using regular dishwashing detergent.

Vinegar + salt (for dark spots)

If dark oxide spots appear on copper products, we recommend the following method. Prepare the following components:

• table vinegar;
• table or sea salt.

Mix 1 cup of bite with 1-2 tbsp. l. salt. Without waiting for the salt to completely dissolve, place copper objects in this mixture and lightly rub the surface of the products with salt. You will see the result instantly - there will be no trace of oxidation left. When finished cleaning, rinse items thoroughly and wipe dry.

Tomato paste/ketchup (from blackness)

This seemingly unusual method has actually proven itself well for cleaning copper products from blackness . You will need:

• tomato paste or ketchup;
• a piece of cotton fabric.

Apply a generous amount of ketchup to the product and leave for 1 hour. After time has passed, rub the copper object well with a piece of cloth and rinse with water. This method will help not only effectively remove stains, but also restore the brightness of the color of the metal.

Ketchup will help remove dark stains on the surface of products.

Flour + salt + vinegar (for shine)

This method will help you not only wash away dirt, but also give the product a dazzling shine . You will need:

• Wheat flour;
• salt;
• table vinegar.

Mix the ingredients in equal parts and rub the resulting mixture onto the copper object. Leave it for a while. Then rinse the items well under running water and wipe dry.

To polish copper objects, we recommend using sheets of black and white newspaper. Crumple a few pages and walk the resulting lump over the surface of the metal. The product will shine like new!

Salt + vinegar (for heavy soiling)

For old stubborn stains that are difficult to remove, we have a special method. You will need:

• salt;
• table vinegar;
• stainless steel saucepan or bowl.

In a saucepan, mix half a glass of salt with a glass of vinegar and place the copper object in the resulting solution. Place the container on the fire and bring to a boil. Turn off the heat and leave until completely cool. Then remove the products and rinse thoroughly with water.

Store copper utensils in a clean, dry place and wipe them periodically with a clean cloth.

We hope that our tips will help you keep copper products in excellent condition to the delight of yourself and your household. At the end of the article, I would like to add that in clean, shiny dishes, dishes are guaranteed to turn out tastier and more aromatic.

Additionally, we recommend watching videos that contain quick and effective methods for cleaning copper at home:

About the author: Irina Tertychnaya

Graduated from the economics department of the Aviation University. Married, has a daughter. Loves to play musical instruments and spend time in pleasant communication. She always strives to learn something interesting and master a new craft. Loves to cook for the whole family. Life motto: “Never give up!”

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Threads made of gold and silver, which were used to embroider clothes in the old days, are called gimp. To obtain them, the metal wire was pulled for a long time with pliers to the required fineness. This is where the expression “to drag out the rigmarole” came from - “to do long, monotonous work” or “to delay the completion of a task.”

Before removing various stains from clothing, you need to find out how safe the selected solvent is for the fabric itself. It is applied in a small amount to an inconspicuous area of ​​the item from the inside out for 5-10 minutes. If the material retains its structure and color, you can move on to stains.

There are special traps to combat moths. The sticky layer with which they are covered contains female pheromones that attract males. By sticking to the trap, they are eliminated from the reproduction process, which leads to a decrease in the moth population.

The habit of using an automatic washing machine “sparingly” can lead to the appearance of an unpleasant odor in it. Washing at temperatures below 60℃ and short rinses allow fungi and bacteria from dirty clothes to remain on internal surfaces and actively multiply.

The dishwasher cleans more than just plates and cups. You can load it with plastic toys, glass lamp shades and even dirty vegetables, such as potatoes, but only without using detergents.

Fresh lemon is not only suitable for tea: clean dirt from the surface of an acrylic bath by rubbing with half a cut citrus, or quickly wash the microwave by placing a container of water and lemon slices in it for 8-10 minutes at maximum power. The softened dirt can simply be wiped off with a sponge.

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

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Stretch ceilings made of PVC film can withstand from 70 to 120 liters of water per 1 m2 of their area (depending on the size of the ceiling, the degree of its tension and the quality of the film). So you don’t have to worry about leaks from neighbors above.

The easiest way to remove scale and carbon deposits from the soleplate of the iron is with table salt. Pour a thick layer of salt onto the paper, heat the iron to maximum and run the iron over the salt bed several times, applying light pressure.

Source: https://hozpedia.ru/chem-chistit-med.html

How to clean copper from green deposits at home - the best remedies

Copper is a noble metal. It tends to darken, oxidize, and become covered with a green coating. The reasons may be different, but the metal product deteriorates in any case. There are many ways to clean copper at home that will help restore items to their former shine and neat appearance.

Types of contamination on copper products

If a green or black coating appears on a copper product, it’s time to clean it

Jewelry, dishes and antiques made of copper, as a result of prolonged use, as well as frequent contact with moisture, begin to lose their quality. Products that are exposed to frequent heating and are exposed to open air oxidize the most.

Household items in active use become black and stop shining. As a result, copper cookware, without proper cleaning, begins to release toxic substances that are harmful to health. Such items become unsuitable for cooking.

Tarnished copper jewelry can independently return to its original appearance. This happens due to changes in the external environment in which the products are stored or used.

Safe Copper Cleaning Products and Tools

The green coating is toxic, so you need to wear gloves, goggles and a protective bandage when working

To choose the right method for cleaning copper at home, you should determine whether the product has an oxide coating or is coated with varnish.

To do this, apply a small amount of a mixture of soda and acetic acid to the darkened area. If the treated area quickly becomes lighter and begins to shine, it means that the product is not varnished and needs to be cleaned.

If protection is present, it is enough to wash the copper object with warm soapy water.

Green deposits on copper release toxins, and cleaning products can be harmful to health, so when cleaning products, you should take care of your own safety. It is necessary to prepare rubber gloves, safety glasses and a cotton-gauze bandage.

The most gentle means

Ketchup contains acid, which gently removes plaque from copper

Valuable copper items, such as coins or antiques, must be cleaned very carefully, using products that do not scratch or mar the surface. Can be applied:

• 10% solution of citric acid , which will help to carefully remove any plaque from the copper surface.
• Kefir or ketchup . Acidic foods dissolve plaque well. Place the contaminated item in any ingredient for several hours, then wash under running water.
• Soap solution . Pour boiling water over grated laundry or baby soap. Then place the copper item in it for several hours.

The last method takes a lot of time. They cannot remove heavy stains the first time. But it is gentle and will not damage a valuable product.

Chemicals for cleaning copper products

When cleaning copper from greenish deposits with chemicals, you should not use abrasive substances that can scratch the surface. It is better to purchase preparations intended for precious and non-ferrous metals, which are available in the form of gels and pastes.

Names of some copper cleaners:

• Unicum is a gel-like preparation that can be used to restore the original appearance of metal and restore its shine. Does not leave scratches and easily removes dirt.
• Centralin is a paste that cleans copper products in a short time, restores their shine and forms a protective moisture-repellent film.
• Delu Kupferfix polish – gently cleans the copper surface, protects against tarnishing and removes dirt.
• Sambol – gently and thoroughly cleans products. Removes dirt and oxidation without damaging the surface. Restores shine and protects against darkening.

Before using the drug, you should try it on a small surface of a copper product. If the metal does not react, continue cleaning.

Folk remedies for removing plaque from copper

You can make a “vinegar paste” from vinegar and flour, which cleans copper products well.

You can clean copper products with improvised substances, which are cheaper and safer for the body than chemicals. Here are some simple recipes:

• Dishwashing gel . Helps clean lightly soiled items. The product is treated with a soft sponge with a product applied to it. Then rinse under running water.
• Lemon . The copper surface is rubbed with half a citrus fruit. For greater effect, clean with a fleecy elastic brush.
• Vinegar and flour . You can restore the original shine using a product popularly called “vinegar dough.” Wheat flour and acetic acid are mixed in equal proportions. The mixture is applied to the product and left until completely dry. The resulting crust is easily wiped off, the surface is polished with a soft cloth.
• Ammonia . To remove green deposits and blackening, the product is treated with ammonia and thoroughly rinsed under running water.
• Salt and acetic acid . Dissolve 2 tbsp in a weak vinegar solution. l. salt. The item to be cleaned is placed in the container and boiled for 10 minutes. Then the product is immersed in clean water for a while, after which it is wiped dry with a soft cloth.

When using any of the methods, you must adhere to safety rules.

Step-by-step instructions for cleaning copper products

After removing the plaque, the copper object must be polished with goi paste

Whatever substance you choose to remove plaque, you need to follow a certain order in the work. To clean copper jewelry and other items made from this metal, you should:

1. Wash the product well with dish gel and dry it.
2. Apply cleaning agent to the surface to be treated.
3. Gently wipe the product with a soft microfiber cloth, sponge or toothbrush.
4. After complete removal of plaque or dirt, wash the item to be cleaned under running water.
5. To restore shine, you can wipe the product with lemon, then rinse.
6. Dry with a towel or soft cloth.

After all the manipulations, you need to polish the copper item using GOI paste, which resembles plasticine. Rub the surface with a piece of the product, wash the item and dry with a towel.

You can also use toothpowder to polish copper.

Prevention of green plaque formation

To prevent oxidation of copper objects, you need to store them in special cases, putting a piece of chalk in there. Copper products should not be exposed to direct sunlight. You also need to store them away from heating devices and radiators.

To prevent green tarnish from appearing on copper jewelry, you should wash and polish it with a cloth after each use. Do not leave items wet; it is better to wipe them dry immediately after washing.

By learning to clean copper from green deposits, you can extend the life of objects and devices. They, in turn, will create coziness in the room, and copper jewelry will delight you with its shine and warm, clean look.

Source: https://kliningovyj-raj.ru/mojka-i-mytyo/cem-cistit-med-v-domasnih-usloviah/

How to remove green deposits from copper - Metalist's Guide

Have you found an old copper coin that has long been oxidized and coated with plaque, and want to restore its original appearance? What to do if you find an old coin and want to sell it or keep it, but don’t have extra money for restoration? In this case, you will have to do everything yourself. We hope that this article will help you understand how you can clean plaque from a copper coin at home.

Preparing for cleaning

Various alloys and metals, which have been used to make coins since ancient times, mostly tend to become coated and succumb to erosion. Of course, it could also be ordinary dirt and dust, which can be easily removed with a regular toothbrush and warm tap water. But how to deal with the oxidation of copper and the appearance of green spots on the coin? Dealing with this at home is not an easy task.

The procedure for cleaning a coin from the effects of oxidation and green spots characteristic of old copper largely depends on the characteristics of the alloy itself, which was the basis of the coin . In addition, different types of erosion will require different cleaning approaches, and mixing them up can damage the coin.

The first thing you need to know is don’t bother with cleaning until you figure out what’s going on. An inept and careless approach to cleaning can harm the coin even more than the erosion itself. Dirt and corrosion can penetrate deep into the coin, and with its cleaning, all the value of the coin will be lost irrevocably, giving way to pits and abrasions.

There are different types of corrosion, and the approach to cleaning each is different:

• The most common is green erosion. It is obtained by the oxidation of copper; in fact, it is copper carbonate.
• Reddish coating.
• Yellow plaque. This happens if the coin has been in contact with lead objects for a long time.

Tools and cleaning products

What products can help when cleaning coins at home? First of all, these are harmless products that are always available in the house:

• regular lemon and citric acid;
• salt;
• flour;
• vinegar;
• tooth powder, toothpaste and an old toothbrush that you no longer use;
• old unnecessary newspaper;
• a soft cloth to wipe coins.

This will be enough for you to cope with a raid of easy to medium difficulty. You may also need a special jewelry cleaner, which you can buy at the nearest jewelry store in your city.

Different ways to clean a coin

Among the most popular methods for cleaning copper coins at home are the following:

• Take a regular lemon. Cut it in half. Press a coin into the lemon pulp and leave it in this position for 15-20 minutes. After the procedure, clean the coin with a toothbrush, rinse in cold water and wipe with a cloth until it is dry. You should always wipe a coin, since leaving it wet for a long time risks getting dark spots on the material.
• Mix salt and flour, adding a drop of vinegar to the mixture. The salt should be coarse. Rub the solution onto the coin and give it time to soak in. This will take about 15-30 minutes. After the solution has worked, rinse the coin and wipe until dry.

• Take regular boiling water, stir vinegar in it in a ratio of 4 to 1. Add two tablespoons of salt to this solution. Place a coin there and wait for the solution to cool. After this procedure, carefully remove the item, clean it with a toothbrush and rinse. Don't forget to wipe the coin dry!
• Rub the coin with whitening toothpaste or plain tooth powder. Rub the product firmly, but do not damage the coin. Rinse. If the result is unsatisfactory, repeat the procedure again and again until the coin becomes cleaner.

• You can also purchase a special jewelry cleaner at any jewelry store. The product is a ready-made solution for cleaning products, including copper coins. All you have to do is dip a coin into the solution, hold it there for several minutes, and then wipe it dry with a cloth.
• Are you afraid of damaging your coin? Do you think it's too valuable to experiment with cleaning? Just give the coin to the jewelry shop for a certain price. There they will polish it for you and apply a special coating that will save the coin from a green coating for a long time.
• As a periodic preventive measure, we recommend wiping the coin with an old, worn newspaper. No matter how strange it may sound, this procedure helps in cleaning the coin, and it will not darken for a long time.

Copper alloy coins

According to the characteristics of the alloys from which different coins are made, it is necessary to approach their cleaning. Adding different metals to bronze changes the material itself, so some of the methods described above may not work. To replace them, other methods can be proposed that would depend specifically on the alloy. Among the most popular alloys for creating coins in old times, we note the following.

Copper-nickel alloy. Nickel is a very long-lived material and rarely erodes or oxidizes. Such coins remain unharmed longer, but it is the copper in their composition that deteriorates over time. Oxidized copper-nickel coins become covered, like erosion on pure copper, with a green or red crust. Cleaning such coins is similar to pure copper coins.

Bronze coins. Unlike ordinary copper coins and nickel alloys, this material (remember that bronze is an alloy of copper and tin) has a number of its own characteristics, which must also be taken into account to achieve a satisfactory result.

How to remove dirt from bronze coins?

• place the desired coin in a glass filled with distilled water;
• let the dirt that covered the coin soak;
• Using a toothbrush and soap, rinse the coin in warm water, rinsing the object from time to time during the cleaning process;
• When the dirt is removed, wipe your coin.

To remove oxidation from bronze, prepare a special solution that contains sulfuric acid (preferably a five percent concentration) and leave the coin in it for several hours. This method will help you get rid of severe oxidation on bronze coins.

For lower degree oxidations, a solution with acetic or citric acid, up to 10% concentration, is also perfect.

You can remove small spots of oxidation on a coin using a regular needle to protect other coins that will lie next to this one from oxidation.

To properly care for bronze coins, it is recommended to rinse them regularly. To do this, rinse the coin in distilled water, and after this procedure, wipe with a paper napkin or dry towel.

Applying patina to the coin

It is extremely important to maintain the original appearance of your coin by applying a new patina to its surface.

Patina is an artificial protective coating on coins of copper and other copper alloys, including bronze. By applying a patina, you can preserve the appearance of the coin for a long time, and it will be protected from erosion and oxidation.

The recipe for applying this film is as follows:

• Take simple potassium permanganate and copper sulfate, the proportions should be at least three to one (the best proportion is 50 grams of potassium sulfate and 5 grams of potassium permanganate per liter of water). Place them in an old and unnecessary pan, fill the mixture with water and put on fire. It is advisable to do this outside and use a fire.
• Put out the fire when the water has boiled. Leave the pan over the heat. Stir the contents while gradually adding coins into the pan. During this process, the coins should change their color.
• Remove the contents from the pan and carefully arrange the coins to dry.
• Preserve the patina. A special solution of alcohol and benzene will help you with this. The proportions should be one to one.
• And lastly, wipe them using vegetable oil.

How to store copper coins at home?

The right approach to storage is the key to the safety of your copper coins. The more the conditions of their maintenance correspond to the norm, the less time you will have to spend on their restoration.

  How to distinguish copper from brass

Here are some tips for storing coins properly:

• To avoid constantly handling each coin, which can also cause the metal to deteriorate, place your collection on a wooden or cardboard tablet. You can also use albums that have plastic pockets.
• Keep your collection dry and clean.
• If you have to take a coin in your hands, take it only by the edge, do not touch the sides of the coin.
• Wash the contents of your collection with warm water and soap from time to time.

Proper care of your coins will turn your numismatic hobby into an even more exciting experience. Always maintain the collection in a presentable manner and in appropriate conditions.

Source: https://ssk2121.com/kak-ubrat-zelenyy-nalet-s-medi/

How to clean copper cookware at home?

› Useful tips ›

21.04.2019

Copper cookware is now not only an item for daily cooking, but also a fashionable element in the interior, occupying a place of honor among kitchen utensils.

In the Norman village of Villedieu-les-Poels, the production of not only copper jewelry and decorative items, but also kitchen utensils began in 1830.

Copper is considered a unique material; if properly cared for, it is not subject to corrosion and has high thermal conductivity.

The inside of the dishes is coated with a special alloy - tinned tin, which prevents direct contact of the cooking products with the acidic environment.

However, the material still requires proper and timely care.

Decorative items made of copper require rubbing to a shine, and kitchen utensils in the form of pots, pans, stewpans, basins and turks should be regularly inspected and washed thoroughly to avoid an unpleasant gray-green coating, and sometimes rust.

Oxide on copper products mainly appears in areas subject to frequent heating.

To prevent this from happening, it is necessary to carry out regular preventive cleanings.

Some of the most commonly used folk methods are:

1. Mix flour, salt, vinegar in equal proportions, apply to the entire surface of the dishes, rinse with water and wipe dry with a towel;
2. add two tablespoons of table salt to one liter of vinegar, bring to a boil and immerse the copper bowl until completely cool, then rinse with water, rub with a napkin until shiny;
3. prepare “vinegar dough” from flour and vinegar, cover the entire surface of the copper until completely dry, then remove with a sponge;
4. crumpled newspaper will not remove stains and deposits, but will impart a radiant shine to the surface of the product.

Why do copper cookware need to be cleaned regularly?

Copper is one of the metals that can tarnish and oxidize.

https://www.youtube.com/watch?v=s2-0hGlxXgw

For prevention, each time after using kitchen utensils, they must be thoroughly washed and wiped dry, and also avoid direct exposure to direct sunlight.

Regular cleaning will promptly eliminate the formation of plaque and the release of toxic substances.

This regular maintenance will extend the life of the copper.

How to clean copper?

Several modern means are considered the most effective and fast-acting:

1. Copper cleaning paste was developed by the cookware manufacturers themselves, who, like no one else, know all the intricacies of caring for such products. According to the instructions, just apply the product to a sponge and wipe the surface with dirt in a circular motion. Rinse thoroughly under water and rub with a towel;
2. gels are especially suitable for kitchen copper items. Eliminate traces of corrosion and oxidation products, degrease the surface. These products are also widely used in catering establishments. After applying the product, no additional rinsing with water is required;
3. rubbing wipes are considered one of the most gentle, but less effective methods. Without the use of additional products, they can only give a radiant shine.

How to clean copper from green deposits?

Green plaque on copper releases toxins and must be removed. Not all means can cope with its elimination.

There are several ways to remove corrosive plaque:

• The carbonated drink “Coca-Cola”, due to the presence of phosphoric acid in it, will clean and get rid of any contamination, especially green deposits. Pour this sweet fizzy drink into a small glass container and place a pot or frying pan in it for several days. This is a very original and at the same time effective method;
• ethyl alcohol mixed with turpentine and oxalic acid will also cope with green plaque. It is enough to saturate a soft sponge or rag with this liquid and apply it to the contaminated surface;
• Apply white chalk mixed with kerosene to a mushy state to the area of ​​contamination or plaque formation. This is a great way to rub and add shine to a copper piece.

How to clean copper utensils from blackness?

Black plaque is also considered toxic. Requires mandatory elimination. However, such kitchen utensils can no longer be used for cooking.

To help get rid of blackness:

juice from half a lemon will remove the blackness if you rub it on the product, then rinse under the tap and wipe dry. If you don’t have lemon at home, you can replace it with citric acid, diluted with water to a paste.

hot soap solution diluted in a container. It is enough to immerse the dishes in it for a short amount of time. Then rinse lightly under running water and wipe dry.

with an ammonia solution . This procedure only needs to be carried out with caution, always in the open air to prevent poisoning from ammonia fumes. It is enough just to wet the sponge and wipe the product with it.

How to clean copper dishes from white deposits?

The white coating formed due to oxidation must be removed.

Several proven and reliable methods will help you quickly deal with it:

Tomato paste or ketchup, due to its high acid content, is good to use to remove white deposits and to give copper a reddish tint. It is enough to mix two tablespoons of paste with one tablespoon of salt and apply the resulting mixture to the product for 10 minutes with a sponge. Then rub in a circular motion over all the outer walls, remove the residue with a paper napkin.

glass of any fermented milk product , it is best to use sour milk, mix with 1 tablespoon of salt, soak a piece of flannel cloth or microfiber cloth with the resulting mixture. Rub the surface until the white coating is completely removed.

amidosulfuric acid , used for heavily ingrained plaque. When using it, it is important to follow safety precautions. This powder is quite aggressive, but quickly cleanses and adds shine to copper.

Mechanical cleaning of copper products

This type refers to professional cleaning and involves pre-soaking in distilled water. Then it is carefully impregnated with synthetic resin to strengthen the patina and prevent scratches during further cleaning.

Craftsmen use needles, brushes with minimal rigidity, manual and mechanical scrapers with different tip shapes, as well as metalworking tools.

This process is considered very long, painstaking, requiring patience and care.

Precautions when cleaning copper

When cleaning with aggressive agents, safety precautions must be observed:

• read the instructions carefully;
• use rubber gloves;
• if necessary, wear a protective mask to avoid burns to the respiratory tract caused by cleaning agent vapors;
• when mechanically cleaning copper, use plastic goggles to protect your eyes from foreign bodies;
• in case of contact with the skin or eyes, immediately rinse the area with water or seek medical attention;
• To avoid damage to copper, it is not recommended to leave the product in acid for a long time, and also to use iron brushes and abrasive substances.

Caring for Copper Cookware

There are several rules for the care and preservation of external and internal coatings:

• store dishes only in a dry cabinet, as humidity and heat contribute to the process of destruction and blackening;
• cannot be washed in the dishwasher, even at minimum temperature;
• do not keep empty dishes on a working stove;
• To avoid scratches, it is advisable to use wooden or plastic kitchen utensils;
• abrasive detergents containing chlorine, as well as metal brushes or sponges, are prohibited;
• Copper cookware does not like sudden temperature changes, so pouring boiling water into it is not recommended;
• food containing a large amount of acids, for example: vinegar, fruits or tomatoes - it is better to put them in another container.

The healing properties of copper have long been proven, but time has not been kind to it. Therefore, only with proper storage, cleaning and care will such dishes last a long time and delight you with their incredible color and radiant shine.

How to clean copper cookware at home? Link to main publication

Source: https://posudaa.ru/poleznye-sovety/chem-pochistit-mednuyu-v-domashnih-usloviyah

How and what to clean copper oxide from at home: the most effective methods

How to clean copper? The relevance of this issue is explained by the fact that products made from this metal have been used by humanity for many centuries. For a long time, the value of this metal was so high that it was equal to gold.

The development of technology has led to the fact that it was possible to significantly reduce the cost of copper production. This made it possible to make not only jewelry from this metal, but also dishes and interior items.

The high popularity of this metal and alloys based on it is explained not only by its decorative effect, but also by its unique characteristics - high ductility, thermal conductivity, corrosion resistance, etc.

No one wants to use oxidized copper cookware.

Cleaning Copper Coins

Coins made of copper are no longer issued in our time, and many such products in the hands of the population are of antique value. That is why the question of how to effectively and at the same time carefully clean such coins is quite relevant.

You can restore the former attractiveness of copper coins using several methods. The choice of each of them depends on the nature and degree of contamination. So, depending on what color the plaque has formed on the surface of the old copper coin, you can clean it using one of the methods listed below.

• If there is a yellowish coating on the surface of the coin (this indicates that it has been in contact with a lead product), then it should be cleaned with a 9% vinegar solution.
• Clearly green plaque is cleaned with a 10% citric acid solution.
• Coins made from copper may also have a reddish coating. Such a coin is cleaned by dipping it in a 5% ammonia solution or ammonium carbonate.

Calculate the use of chemicals depending on the degree of contamination

Old coins made from copper may have a layer of patina, which gives them a more noble and aged appearance. If there is no such plaque, you can create it yourself, even at home. To do this, use a solution consisting of a liter of distilled water, 50 grams of copper sulfate and 5 grams of potassium permanganate.

The resulting solution is heated over low heat, without bringing it to a boil, and then coins are placed in it, which must be covered with a layer of patina. They are periodically turned over, and when the color of their surface acquires the desired shade, they are removed.

To consolidate the effect obtained, the surface of completely dried coins can be treated with benzene and alcohol mixed in equal proportions.

Source: http://met-all.org/cvetmet-splavy/med/chem-kak-pochistit-med-v-domashnih-usloviyah.html

How to clean copper from green deposits and dirt

Copper is a fairly soft metal that loses its attractive shine over time. Unfortunately, it is impossible to overcome natural oxidation processes. But it is possible to provide copper products with favorable operating conditions and timely cleaning. And then they will regain their original shine and serve their owners for many years.

Why do copper products need to be cleaned regularly?

When air and moisture come into contact, a film forms on the surface of the copper. It must be cleaned, because this coating not only spoils the appearance of the product, but can also be unsafe for humans.

Plaque on metal forms for two reasons.

When oxygen and copper interact, a chemical reaction occurs that causes the metal to oxidize. At the first stage of oxidation, copper changes its color to purple with a reddish tint. If the deposit is not cleaned off, the oxide will subsequently turn black.

Plaque on a copper product

When copper is left in a humid environment for a long time, a dense green coating forms on the metal - this is the so-called hydroxyl film. Copper hydroxide is poisonous. You cannot eat from dishes that have such a coating. You need to take precautions and remove the film.

Also, copper products may develop a white coating or rust.

Effective Copper Cleaning Methods

Before using various methods to clean copper, wash the product in warm soapy water or dishwashing liquid. This will help remove minor dirt, dust and add shine. If after the procedure the surface remains unchanged, proceed to cleaning using one of the methods convenient for you.

Copper cookware should not be washed in the dishwasher. It is preferable to wash and clean by hand.

Vinegar with salt

They cope well with thick layers of plaque. To clean, pour 9% vinegar over the plaque and sprinkle with finely ground salt. After 10 minutes, wipe with a cloth and rinse.

Cleaning copper with ammonia

Soak a rag in ammonia and apply it to the copper product. Then wipe with a clean rag to remove the ammonia. For a better effect, chalk chips are added to the alcohol. It mechanically scrubs and absorbs dirt.

Cleaning copper with phosphoric acid

To clean copper from rust, phosphoric acid is used. The product is dipped in a 15–30% solution of orthophosphoric acid and applied with a brush or spray. Leave for a few minutes to take effect. Clean off plaque with a cotton cloth. If necessary, repeat the procedure.

Cleaning with ketchup

This unexpected solution has proven itself in cleaning copper products from black deposits. Apply a generous amount of ketchup or tomato paste to the metal. Leave for an hour and wipe with a cotton rag. The fruit acids contained in tomatoes will not only get rid of plaque, but also restore the brightness of the metal.

Cleaning with salt and lemon

Squeeze the juice of one lemon. Add salt until a paste forms. Using a cloth or toothbrush, clean the surface of the copper to remove any dirt.

Using Baking Soda

Baking soda is one of the popular substances for cleaning metal objects. When cleaning with baking soda, copper products regain their lost shine.

Vegetable oil

Vegetable oil fills microscopic cracks in metal. Thanks to this, the product looks smoother, gaining a natural shine.

Use of chemicals

In addition to regular household cleaning products for cleaning copper, you can purchase specialized preparations at a jewelry store. They are good because they carefully clean the metal without damaging it. Such drugs include Trilon B.

How to clean copper products until they shine?

The choice of cleaning method depends on the degree of contamination and the type of product that needs to be treated.

Cleaning copper from white deposits

White spots on copper are also formed due to oxidative reactions. They usually appear on products made from alloys of copper and other metals. One of the presented methods will help against this kind of contamination: using ammonia, vinegar with salt or ketchup.

How to clean copper from black and green deposits?

Ammonia can deal with black and green deposits. You can also remove the toxic layer with a mixture of turpentine, oxalic acid and vodka. The ingredients are mixed in equal proportions and the copper products are cleaned with it using a cloth.

Cleaning copper from rust

To renew rusty copper products, use aggressive acids such as hydrochloric acid. Apply acid to a piece of cloth and treat the copper with it. After treatment, rinse thoroughly to remove any remaining aggressive substance.

When working with acids, be sure to wear gloves. And clean only in a well-ventilated area.

How to clean copper oxide?

To remove oxide in the form of a reddish coating, place the product in a 5% ammonia solution or ammonium carbonate. Hold until the plaque begins to come off.

How to clean a copper pot inside and outside?

The outer surface of the Turk can be cleaned using any of the methods presented above.

If you do not have experience working with aggressive chemicals and acids, use accessible and safe methods.

On the inside of the Turks, it is recommended to use softer substances so as not to damage the coating. For example, soda or ketchup.

How to clean tinned copper?

During the tinning process, a thin layer of tin is applied to the inside of copper cookware. Tin is a soft metal and must be cleaned with care.

Do not use sharp objects or harsh abrasives.

To clean a tinned copper product, you need to wash it with dishwashing detergent. Severe dirt is removed point by point with a soft brush or fine steel wool, previously soaked in vegetable oil.

How to clean a copper samovar?

The copper samovar is an antique item. Therefore, it is especially important to preserve its appearance and extend the service life of an antique device.

To clean a copper samovar, take salt, vinegar and flour in equal proportions. The ingredients are mixed and applied with a sponge to the outside of the samovar.

After treating the entire surface, remove any remaining cleaning agent with a dry cotton cloth. To make the surface shiny, wipe it with lemon.

If there are deep stains in the samovar, they can be removed with kerosene. Soak a cloth in the mixture and wipe particularly dirty areas.

How can you clean a brass samovar?

Brass is an alloy of copper and zinc. Aggressive chemicals and abrasives can damage the surface of such a samovar.

For safe cleaning, use oxalic acid. It must be diluted in 1 liter of water, applied to the surface of the samovar and left for 5 minutes for the reaction to occur.

Afterwards, the solution is washed off and the surface is wiped with a sponge soaked in soda solution to neutralize the acid. Rinse the product and wipe dry.

Clean a copper basin at home

As a rule, a copper basin is used to make jam. Such dishes have good thermal conductivity, antiseptic properties, are safe for humans, and when cooking the jam practically does not stick to the walls.

If the jam is still burnt, the copper basin can be cleaned with vinegar dough. For this ancient method, you need to knead the dough by mixing flour and table vinegar. Next, the dough is rolled out thinly and placed on the dirt.

After the mixture dries, carefully remove it. The vinegar paste absorbs dirt, making the surface perfectly clean.

Cleaning Copper Coins

Antique copper coins often have high antique value. Therefore, it is important for every numismatist to know how to clean a coin without damaging it.

"Trilon B"

This special chemical mixture can be purchased at jewelry stores. It does not destroy the surface of copper products and carefully cleans them of oxide.

Dip the products into the solution and hold for 10–20 minutes. In case of severe contamination, the procedure can be repeated.

Kefir and vegetable oil

Kefir contains non-aggressive acids that gently cleanse copper. Place coins in fermented milk product for 1 hour. Then rinse with running water and dry.

Vegetable oil also gently cleans coins, filling small cracks and giving them a natural shine. Pour 2 cm of oil into a pan and boil. Using tweezers, lower the coins and boil them for 10-20 minutes. Then rinse the items with dishwashing liquid and dry.

Citric acid and vinegar

Vinegar will help remove dark spots on old coins. Dilute 1.5 tbsp in 500 ml of water. spoons of vinegar (9%) and salt. Dip coins into the liquid and put on fire. Boil for 10 minutes, rinse and dry.

On a note. Instead of vinegar, you can use citric acid or freshly squeezed lemon juice.

How not to clean copper products

In order to preserve the shine of copper products for a long time and not scratch their surface during cleaning, you must not:

• use abrasive materials and hard metal objects;
• subject to constant exposure to humidity;
• remove the varnish layer, if there is one on the product;
• expose to direct sunlight and heating devices;
• leave copper objects dusty, without carrying out wet cleaning for a long time.

To maintain the attractive appearance of copper products, they need to be cleaned regularly. It is important to remember that over time, copper wears off and objects become thinner. Therefore, do not wait until the dishes and decorations are covered with a thick layer of dirt. After all, small stains are easier to clean using more gentle methods.

Source: https://hoznauka.ru/veshhi/dragotsennosti/kak-pochistit-med.html

How to clean copper products from blackness at home

Copper is a metal that becomes cloudy over time and loses its natural luster. This fact is associated with constant contact of the metal with a humid air atmosphere. The destruction of copper is a natural process, so it makes sense to use natural remedies to combat blackness and metal oxides.

There are many commercial products that are designed to clean copper from oxides, but these products contain chemicals that are harmful to human health. Luckily, there are a number of home remedies that can be used to clean copper products and are even recommended instead of commercial products.

Metal oxidation

Copper (lat. Cuprum) is a chemical element , which in D.I. Mendeleev’s periodic table is designated by the symbol “Cu” and has serial number 29. It is a transition metal with a characteristic luster of a reddish hue. In most chemical compounds, copper exhibits the +2 oxidation state, but can sometimes be in the +1 oxidation state.

When exposed to open air, the color of the metal changes to red-violet, which is associated with the formation of Cu2O oxide (copper oxide I) on its surface, which then turns into CuO oxide (copper oxide II), which has a blackish tint. In turn, copper ions Cu2+ give it a bluish tint.

Copper objects placed for a long time in a humid atmosphere are covered with a dense hydroxyl film, which has a green color . Copper hydroxide is poisonous.

Also, greenish-blue films of copper acetate can form on the surface, which are obtained as a result of the interaction of the metal with acetic acid, have a bitter taste and are poisonous.

When using copper cookware for cooking, appropriate precautions must be taken to avoid poisoning due to the presence of oxides and hydroxides on the surface of the copper.