How to solder with liquid rosin

Alcohol-rosin soldering flux

For soldering, not only pure rosin, but also its solutions are used as a flux. In particular, many people know alcohol-rosin flux. It is neutral, so residues do not corrode metals and do not need to be washed off.

The ingredients for the alcohol-rosin solution have been known for tens and even hundreds of years. Raw materials for their production are always in abundance, so this flux is inexpensive.

Positive properties

Rosin was obtained from cuts of coniferous trees. Volatile components were evaporated. The remainder was three-quarters of the original mass of resin. Rosin for soldering was used only after such preliminary preparation.

Everything would be great, but when working, you need to dip a hot soldering iron into the resin flux. The main tool is then covered with chemical mud, so that the working area is not very visible.

Over time, it became clear that liquid rosin as a flux is much more convenient to use. Due to the presence of natural resin substances of a soft acidic nature, it:

• perfectly removes the oxide layer on parts;
• spreads well;
• occupies the entire adhesion site.

Ethyl (wine) alcohol was and continues to be used as a solvent, producing an alcohol-rosin composition . Rosin is also highly soluble in acetone, benzene, gasoline and some other organic solvents.

Ethanol is the safest and most convenient solvent option for rosin. In terms of chemical properties, isopropyl alcohol is close to ethyl alcohol, but it is much more difficult to find in everyday practice. This is purely a chemical reagent.

Application

Alcohol-rosin flux has not lost its relevance for many years due to its ease of use and positive soldering results.

It guarantees a strong connection of many parts, especially copper products. Using alcohol-rosin flux, radio circuits and boards are soldered. It spreads well, reaching hard to reach places. When working, low-melting solders are used (up to 330 ℃).

Currently, a full range of soldering products is on sale, including SKF alcohol-rosin flux. Both domestic and foreign manufacturers are trying.

You can buy ready-made SCF flux and not do anything on your own. If all proportions are met in accordance with the standards, the composition will live up to expectations.

How to do it yourself

Many home craftsmen prefer to prepare alcohol-rosin flux with their own hands. In this case, they are confident in the content, and the process takes a few minutes.

First, the resin must be thoroughly crushed. The better this is done, the faster the uniform distribution of all substances in the solvent will occur. The result is a high-quality alcohol-rosin flux.

You can wrap a piece in thick fabric. Some solders advise using cellophane, although it is less durable. It may tear during subsequent procedures.

The wrapped rosin is placed on a sturdy table, then methodically smashed with a hammer to a powdery state. The most dexterous craftsmen manage to use ordinary meat grinders for grinding.

In other practices, crushed rosin in a sheet is rolled out with force with a rolling pin or a thick bottle. the goal is clear. To prepare alcohol-rosin flux, you need to obtain a dusty powder.

After grinding, the resin is carefully poured into a bottle or vial. Many people like containers for nail polish or perfumes and cosmetics. Dust should not fly across the table. You need to get used to it and do it carefully.

Then medical alcohol is poured into the bottle. The composition of the alcohol-rosin flux is almost ready. The recommended liquid to dry ratio is 2 to 3.

If you need a more viscous flux, you can increase the proportion of resin. Each master can choose the concentration of the rosin solution in alcohol independently, focusing on personal experience, the specifics of the work to be done, and the nature of the details.

If the pieces of resin were not crushed enough, it will be a little more difficult to dissolve the rosin. You will have to wait a couple of days for the alcohol-rosin flux to become homogeneous.

Is it possible to replace alcohol?

Some experienced soldering workers who are trying to save alcohol for other purposes advise using cheap colognes. The recommendation is controversial. It will smell nice, but the additives contained in the perfume can harm the soldering area.

Advice to use vodka instead of alcohol is also not very legitimate. Rosin is an organic product and does not dissolve well in water. Vodka is a mixture of alcohol and water. It is much more difficult to dissolve resin in a vodka mixture, even if the vodka is of high quality.

Considering that at home, flux consumption is measured in moderate quantities, you can buy medical alcohol. The guaranteed quality of the alcohol-rosin mixture is worth the effort . In practice, homemade flux, made correctly, is not inferior to commercial products.

Source: https://svaring.com/soldering/flus/spirto-kanifolnyj-flus

Liquid rosin for soldering

Everyone knows that soldering anything is done using rosin. However, not everyone knows that in addition to the classic solid version of this consumable, there is also a liquid modification. Liquid rosin is one of the types of neutral flux. The use of this material is ideal for performing soldering work on a small area of ​​the product.

Of course, liquid rosin is not an independent consumable for soldering. The material itself has a solid state of aggregation, while the liquid version is nothing more than a solid mixture of classic solid rosin and some solvent.

Some organic substances are capable of dissolving solid rosin; as a result of this reaction, it is possible to create a liquid version of this consumable.

Regardless of the specific model, some neutral substance is used as a solvent, which will in no way affect the final soldering results.

One of the main advantages of the liquid modification of this material, which classic solid rosin does not have, is that the material is able to spread perfectly evenly over the work area, filling even the smallest cracks and holes. Thanks to this property, the welded area is almost perfectly wetted.

Most liquid rosin models do not require any preliminary procedures before soldering. In addition, almost all brands are equipped with a special small brush, therefore, to apply filler material there is no need to purchase any additional product. In this regard, the classic solid rosin is significantly inferior to the liquid version; it must first be split and then heated.

However, the material may lose a small percentage of its potential when exposed to solvent, this happens due to the ratio used. The fact is that when creating liquid rosin, materials are used in a ratio of three to two, in which the solvent predominates.

After the welding process is completed, traces of the filler material may remain on the product. However, this is not a problem, they can be easily removed with alcohol or water (depending on the specific type of solvent used).

The production of liquid rosin is carried out strictly in accordance with state standards.

Classification

Liquid rosin is classified according to several parameters. However, the most important of them is the type of solvent used, in the medium of which classic solid rosin dissolves, resulting in the appearance of liquid rosin. The most commonly used solvent is alcohol . Its purpose is not only to dissolve solid rosin, but also to remove traces of use on the work area.

The high level of popularity of alcohol as a substance for creating liquid rosin is due to the fact that it is not only capable of dissolving a solid type of additive material, but also taking over all its properties. Water ranks second in popularity.

However, there are many more different models for alcohols. Rosin in water is used only in cases where you have to work with a material whose structure is negatively affected by alcohol.

In this case, it also cannot be used to clean the work area from traces of rosin after the soldering process is completed.

The second sign by which different types of liquid rosin are distinguished is the level of concentration of the solvent and the consumable material itself. The ratio can take values ​​ranging from twenty-five to seventy percent of the total volume of the substance.

Composition of the substance, physical and chemical properties of liquid rosin

Oddly enough, the structure of liquid rosin does not contain any rare substances or chemical elements. Most often, the number of components in the composition is two: alcohol or water, they are used as a solvent, and the rosin itself. In some special cases, a small amount of additional substances may be used in the composition, which are aimed at improving the interaction of liquid rosin with a specific material.

Thanks to the high-tech production method, which makes it possible to maintain strict temperature values ​​when producing liquid rosin, the finished substance takes on a homogeneous liquid state without the presence of any sediment.

In particular cases, water is used for this, but it is not capable of dissolving solid rosin on its own.

Therefore, water-based flux, before direct interaction with rosin, is pre-treated with some other substance.

Its final density depends on the value of the ratio used when creating a given liquid rosin.

The properties that the created substance has are identical to classic solid rosin, however, they are much weaker due to the presence of a solvent in the composition.

In simple terms, the higher the concentration of liquid rosin, the more powerful its properties. Unlike classic rosin, the liquid version is a neutral substance in the soldering process, and accordingly, its scope of application is greater.

There are a lot of companies that produce liquid rosin. It is worth taking a closer look at the main technical characteristics of popular brands:

• Lux – 70 milliliters, activity temperature from 180 to 350 degrees Celsius;
• Alcohol rosin - 90 milliliters, activity temperature is from 150 to 250 degrees Celsius;
•  Liquid rosin - packaging volume is one hundred milliliters, activity temperature is 150-270 degrees Celsius;
• F1 – volume 20 ml, activity temperature 150-220.

How to choose?

The correct choice of filler material for soldering directly affects the quality of the final result. The same goes for flux. In this regard, you need to know how to choose the right rosin for soldering.

Important: liquid rosin can only be used in conjunction with a low-temperature flux; this combination is used for simple connections, but if hard solders of a complex structure are used in the soldering process, then the use of liquid rosin will be useless.

If you have to work with a material that is quite difficult to solder, then you need to use rosin with a high concentration.

To perform simple manipulations at home without any problems, you can use models created from two components. They are relatively inexpensive and are quite capable of handling small, simple tasks.

The composition of liquid rosin must be identical to the soldering methods; this should also be given special attention.

Liquid rosin of a complex composition is used only in special cases when the usual composition cannot be used with a certain metal for one reason or another. Most often they are used when working with materials that deteriorate from exposure to alcohol.

A certain composition may simply not cope with the task assigned to it. Even with the help of classic solid rosin, it is not always possible to perform the desired operation.

If you need to perform precise spot treatment, it is best to purchase liquid rosin with a small brush included. You don't have to look for anything to level the layer of substance.

Since during storage the brush is always located inside the package with the substance in a liquid composition, there is no need to clean it.

Features of use

The main difference between the liquid version of the substance and solid rosin is that the former is able to spread in an even layer over the work area without the use of high temperature effects.

Before performing the soldering procedure, any product must be cleaned of traces of corrosion, grease, etc. For this you can use any available solvent. It is important that after cleaning the work area, you need to wait for it to dry completely and only then proceed directly to soldering.

After this, liquid rosin is applied to the work area so that the work area is completely covered with an even layer of the substance. In this case, under no circumstances should you perform any additional operations: heating, mixing with anything, etc. After completing all the above-described manipulations, you can proceed directly to soldering.

 It is worth noting that you need to use a sufficient amount of flux so that it can protect the working surface from the appearance of an oxide film. There is also no guarantee that the soldering procedure will be completely completed the first time. If this fails, then you should increase the amount of flux used and repeat the entire procedure from the beginning.

It is important to perform all movements smoothly and carefully. In the event that flux gets on a non-working surface. It will be very difficult to remove it from there later. Ideally, the soldering procedure should be tediously completed in such a way that there is no need to clean up the work area after completion.

Source: https://svarkagid.com/zhidkaja-kanifol-dlja-pajki/

How to use rosin for soldering: what is it made from?

When soldering, the heated solder oxidizes and must be coated with a protective compound. At home and for low-temperature industrial work, it is convenient to use rosin for soldering. Natural flux has a low melting point and does not emit harmful substances. To penetrate rosin into small crevices, it is dissolved, making a liquid or gel flux.

What is rosin: advantages and disadvantages

Coniferous trees differ from others in their high resin content. If you clean them and remove the water and turpentine, you get a yellow solid - rosin . It is used in the manufacture of many substances. The resin for soldering is pine. It does not contain substances that reduce dielectric characteristics. Other impurities in minimal quantities.

Rosin is a natural flux and has its advantages for those who like to solder at home:

• sold freely;
• low cost;
• natural, does not emit harmful substances;
• It’s easy to create your own liquid composition;
• low melting point;
• high fluidity.

Working with natural flux is easy. Even novice radio amateurs know how to use rosin when soldering. When working at home, it is convenient to use the low melting point of rosin for soldering. In this case, there is no need for enhanced ventilation; simple ventilation of the room is sufficient.

The shelf life of the resin is unlimited . Solid, irregularly shaped crystals can remain in a closed jar for years without losing their properties.

Natural flux also has disadvantages. Rosin, which does not dissolve in water, is at the same time hygroscopic. It absorbs moisture. The soldered joint begins to oxidize. Places where parts are soldered must be immediately coated with protective varnish and other substances.

Methods of obtaining

Soldering flux is obtained from pine sap . Rosin can be obtained from other coniferous trees, but it will contain more impurities. Pine resin is cleaned by heating water and turpentine out of it. The result is a solid, irregularly shaped pieces. Rosin of the Zhivitsa variety is the purest and does not contain fatty acids.

Gasoline is used to make Extraction Rosin. The resin is dissolved in it, then the composition is filtered to remove impurities. After this, the solvent is evaporated. The result is orange or light brown rosin. It is inferior in quality to Zhivitsa, since its acid number is higher.

When making sulfate soap, a by-product is released - tallow rosin . Its composition depends on the materials used and processing technology.

How to make liquid?

Solid soldering flux is not always convenient to use. If the metal is located horizontally and there is a lot of space on the board for working with a soldering iron, just take a piece of flux, melt it and add solder. Often the position of the part is horizontal and the tin flows off. In this case, liquid pine flux is used.

1. Grind the rosin and pour into a glass container.
2. Fill with acetone.
3. Dissolve by placing a sealed container in hot water and shaking regularly.

Acetone can be replaced with turpentine, gasoline, ethyl alcohol and mineral oil to create a DIY soldering flux from rosin . When working with parts of any complexity, it is enough to apply the resulting liquid with a brush.

You can also make a gel. To do this, mix rosin with petroleum jelly. After dissolution, you can fill a syringe without a needle with the composition and apply flux or use a thick composition to rub the surface.

What can be replaced?

Why is rosin needed when soldering and what is it replaced with? The flux must dissolve metal oxides and coat the solder as it melts, protecting it from air . Depending on the metal that is being soldered, borax and shellac varnishes are used. Copper is soldered using wax and Vaseline. Mixed compositions are often created to work with bronze.

To work with not very critical parts, if you don’t have the necessary flux on hand, you can crush an aspirin tablet and drop some water. After mixing everything until smooth, use for soldering.

Organic fat can dissolve the oxide film. It is necessary to take into account its property of melting at low temperatures. Upon completion of work, any remaining grease should be washed off immediately.

Where else can resin be used?

Using tree resin as an additive to paints speeds up their drying . In electrical engineering you can find cables covered with paper impregnated with resins. The low dielectric constant of rosin allows it to be used for impregnation and creation of an insulating layer between high voltage wires.

The car has several components that can be repaired by soldering; the radiator especially often needs to be repaired, eliminating leaks.

Rosin is inserted into the fire fuse. It melts when the heating temperature of the device increases, breaking the circuit and protecting the equipment from overheating.

Familiar with the natural product and bowed instrument. Before each concert, musicians rub their bow with rosin. Rubbing gives the surface the ability to cause small vibrations as it slides along the string. The sound is deeper and richer. At home, you can stick a pin into a tree and tie a thread to it. It is enough to pass a piece of resin along a stretched thread and the pin will “sing.”

Soldering technology

For high-quality soldering with rosin, preparation begins with stripping the metal at the joint. It is necessary to remove dirt mechanically, remove grease using gasoline or alcohol.

The soldering iron will serve much better if it is tinning - covering the lower part of the tip with a thin layer of flux. To do this, the tool is warmed up and dipped into a jar of rosin or liquid flux is applied with a brush. The coating should be uniform, without gaps.

A piece of rosin is applied to the soldering area and melted. When the entire place is cleaned, the oxides are dissolved, solder is applied. It is melted, distributed, and it connects the parts. After cooling, tinning and varnishing are done.

The ends of the wires are first coated with flux, melting it with a soldering iron, then solder is applied, distributed evenly so that it covers the outside of the wire and connects all the fibers.

Alcohol composition

Previously, rosin for soldering was sold only in liquid form . Mainly alcohol solutions were used. It is convenient to work with them on any soldering area. Why melt solid pieces of resin and disperse hot liquid over the board, if it is much easier to apply a solution with a brush that will penetrate into the narrowest places and fill cracks.

If the volume of work is large, you can cover the entire area with an alcohol composition at once and gradually melt the flux in the soldering areas. The correct rosin solution contains an equal amount of components and adheres well to the metal surface.

Tubular solders

Tubular solder is a thin tube filled with flux . The correct consumable for the job should match as closely as possible the chemical composition of what is already on the board. If it is not known what was soldered before, the entire board is cleaned.

Modern technologies make it possible to fill a tube with rosin or other flux without breaks and with the same density along the entire length.

Soldering with tubular fluxes controls the amount of material. After work, there is no need to wipe the board, freeing it from any remaining rosin.

Rosin is a universal flux used for soldering non-ferrous metals. It is a natural product and does not adversely affect health. In many oil and fat fluxes, recycled resin is added to improve the properties.

Source: https://svarka.guru/payka/oborudovaniya/kanifol.html

Do-it-yourself alcohol-rosin flux SKF

Hi all! I am glad to see you all on my amateur radio blog dedicated to electronics and other technical creativity. Today it’s Saturday and it’s November outside the window, so we’re getting ready for the cold - winter is just around the corner.

And I have an article for you, which may not be very long, but it will definitely bring you a bit of useful information. Today I will talk about SKF alcohol-rosin flux, how you can prepare it with your own hands, and also where you can buy SKF flux. Read the article further and find out everything, don’t forget to subscribe to updates!

We have a small table of contents here, this is for convenience.

Flux SKF

Fluxes for soldering are used mainly for two purposes:

• In order to improve the wettability of soldered parts with solder

The surfaces of the parts being soldered may have poor wettability. In this case, the solder will roll into balls like droplets of water on a greasy pan. Flux promotes better distribution of solder over the surface of the parts being soldered; the solder spreads and evenly covers the surface to be soldered.

• To protect against oxide film (this film interferes with the normal soldering process)

Thanks to the oxygen in our air, the surface of the metal can oxidize, and a certain oxide film appears. This oxide film prevents solder from penetrating into the pores of the metal and attempts to solder anything become simply useless. The flux forms a protective film, which in turn protects the metal from exposure to oxygen.

Different fluxes are used for different metals, since each metal achieves these goals differently. So, for soldering aluminum parts, you need to use some fluxes, and for soldering copper parts, others.

SKF flux or simply alcohol-rosin flux is one of the best fluxes used for soldering copper parts. The best temperature range for use is 250-280°C. Due to its liquid form, alcohol rosin easily penetrates into hard-to-reach areas of soldered surfaces.

In addition, SKF flux is made on the basis of rosin, so it does not require rinsing after soldering; rosin itself does not contribute to the formation of corrosion on the metal. In short, after soldering you don’t have to worry - it won’t rust

Source: http://popayaem.ru/spirto-kanifolnyj-flyus-skf-svoimi-rukami.html

Features of rosin for soldering

Household appliances and other electronics can break down at any time. If the damage is not serious, you can try to solder the loose contacts or radio components. To make the connection reliable, use a soldering iron, solder and rosin for soldering.

What is rosin

Many people have heard the word “rosin”, but not everyone knows what it is. The full name of this substance is colophon resin. It is a resin from coniferous trees, which is purified using a special technology before being put on sale. Visually it is a material similar to glass. It feels fragile to the touch.

After application to the soldering site, it protects the seam from the effects of corrosive processes. Rosin contains resinous acids and third-party components.

Properties

Knowing the properties of the material for soldering, you can accurately determine under what conditions it is used:

1. Does not wash off with plain water. To remove rosin residues, you need to use gasoline, alcohol-containing compounds or acetone.
2. The softening temperature of the resinous material starts at 50 degrees. In rare formulations, this parameter can start from 130 degrees Celsius.
3. The main component of rosin is abietic acid. This resin substance occupies 90% of the total composition.
4. Boiling point - from 250 degrees.
5. A brittle material that is easily destroyed by impact or strong movement.

By the color of rosin you can determine the quality of the finished material. If the shade is bright and saturated, the cleaning was not carried out according to the rules and foreign impurities remained in the composition. They have a detrimental effect on the properties and characteristics of rosin. The high-quality composition has a lemon tint.

Varieties

Pine rosin can be divided into three types depending on its production. This changes the properties and characteristics of the soldering material:

1. Zhivichnaya. The juice is extracted from the trees, from which crude rosin is released through heat treatment. Cleaned with chemicals. In the production of this type of material, pine sap is used. This makes rosin cheaper. The finished composition does not contain fatty acids.
2. Talovaya. The starting material for producing melted rosin is sulfate soap. It is released during the paper production process. The highest category varieties resemble gum rosin in composition and properties.
3. Extraction. This material is isolated using a solvent containing crushed wood. Visually darker than other varieties of rosin. The composition contains about 12% fatty acids. The material softens at a temperature of 58–60 degrees Celsius. To improve the characteristics of the extraction rosin, a chemical clarification process is carried out.

Depending on the type of material, the price also changes. Gum rosin is considered the best among other soldering compounds.

What is rosin used for?

Not many people know why rosin is used for soldering. To answer this question, you need to understand that this is a resinous substance that is a flux. When connecting parts with a soldering iron, an oxide film forms on the surface being processed. It prevents the solder from joining the parts. To remove this film, you need to use flux or rosin. The resinous substance effectively copes with this task at temperatures above 150 degrees.

Rosin is used in soldering to improve connection parameters. It will help cope with problems associated with insufficient solder fluidity. It can slowly fill the joint and reduce the strength of the joint. The resinous substance is used mainly for home renovation work. The production uses serious compounds with enhanced characteristics and properties.

Resin can be used not only for soldering radio components and wires.
Varnishes and paints are made on its basis. It is one of the components in the manufacture of plastics. It is used to process strings on musical instruments. In the film industry, rosin is used to create effects. Rosin, properties of rosin and features when soldering

Advantages and disadvantages

Rosin for soldering has strengths and weaknesses. Advantages:

1. Does not conduct electricity.
2. It is an accessible and inexpensive material for soldering. This is due to the fact that the materials for making rosin are distributed all over the world.
3. Effectively removes oxide film from the surface of the processed material.
4. It does not dissolve in water and therefore the liquid cannot wash away the resinous layer.
5. Retains its characteristics at negative temperatures.
6. Safe for the human body. The resinous material does not emit harmful fumes and does not require the use of additional protective equipment.

Flaws:

1. For a resin-based composition to show its effectiveness, you must be able to work with it. It is recommended to practice on non-working parts or mechanisms.
2. Rosin is not effective when working with large parts.
3. A fragile material that must be transported and stored carefully.

Safe for the human body

How can I replace rosin for soldering?

Sometimes home craftsmen have a question about what can replace rosin. In this case, any tin-based flux will do. When using a blowtorch, liquid compounds are used because solid flux will not bring the desired result. Borax can be used instead of rosin.

Soldering process

Depending on what composition was chosen and how the work was carried out, the quality of the seam will depend. Soldering method:

1. Initially, the contacts are cleaned.
2. Then they need to be tinned.
3. After tinning, you need to melt the solder with a soldering iron and stretch it evenly over the joint.

When working with parts, it is necessary to secure them firmly in a vice or clamps to avoid movement during the soldering process.

Rosin for soldering acts as a flux. To use it, you need to choose the right composition and practice on unnecessary elements.

Features of rosin for soldering Link to main publication

Source: https://metalloy.ru/obrabotka/pajka/kanifol

How to melt rosin at home? — Machine tools, welding, metalworking

Rosin is a light yellow, brittle and hard substance that consists of resinous substances obtained from coniferous trees after distilling off turpentine.

Depending on what type of raw material it is obtained from, it comes in different types. Resin rosin is obtained after distilling turpentine from purified resin. Extraction - after extraction of resinous wood, most often pine, with gasoline. Talwood is prepared by the method of fractional distillation of tall oil.

Coniferous resin in everyday life and in folk medicine

Rosin is used for sizing paper, for making sealing wax, varnishes, soap, ointments, plasters, lubricating oils, plastics and electrical cables. It is also used in everyday life for soldering various metals. Violinists rub rosin on their bows, and dancers rub the soles of their shoes.

How to make rosin at home

1. To prepare rosin at home, you will need resin from coniferous trees. The most commonly used resins are pine and spruce resins. To do this, the resin needs to be scraped off with a spoon and placed in a tin can or pot.
2. It is best to cook rosin over an open fire, since turpentine vapors during cooking have a very specific smell. You need to put resin in the pot and put it on the fire.

   Periodically you need to stir it and collect floating debris and foam.

3. The resin must be heated until the boiling stops and the turpentine ceases to be released. Do not build a strong fire, as turpentine vapors are highly flammable. If this happens, under no circumstances should you fill it with water, but rather cover the pot with a piece of thick fabric, limiting the access of oxygen to it.
4. After the boiling stops, the pot will have a viscous mass of light yellow color. You need to prepare cardboard forms in advance into which rosin is poured. Cardboard for preparing molds is the optimal material, as it is convenient to remove the finished product from it.
5. If you need the purest rosin, you can strain it hot using a metal strainer.

   Since it hardens very quickly, you need to work at maximum speed.

6. The rosin must be left in the air for it to harden. It is better not to pour the remains at the bottom of the pot into the mold, as debris usually accumulates there.

In folk medicine, rosin is used mainly externally. It has anti-inflammatory, antiseptic and antiallergic properties.

It is also an excellent preservative and allows you to extend the shelf life of ointments for a longer period.

Ointments for healing purulent wounds, trophic ulcers, burns and dermatitis

1. To prepare the ointment, you need to take twenty-five grams of rosin, beeswax and vegetable oil. Place in a steam bath and heat until dissolved. Then add fifty grams of propolis. Bring the ointment to a boil, but do not boil. Apply the ointment to the wound twice a day and cover with a sterile bandage. Use until complete recovery.

2. Twenty grams of wax, forty grams of butter, fifteen grams of vegetable oil and twenty-five grams of rosin. All ingredients should be melted in a water bath. The ointment should be applied to a cotton cloth in a layer of about three millimeters and applied to the wound. The dressing needs to be changed up to three times a day. The course of treatment is from three to fourteen days. The ointment has an analgesic and antimicrobial effect.

3. You will need one part each of rosin, honey and olive oil. Heat rosin in a steam bath, add honey and olive oil. Wait until it dissolves, but do not bring to a boil. Cool the ointment and apply to the affected areas under a bandage.

A unique ointment for resolving tumors

The ointment is used externally for cysts on the ovaries and uterus, fibroids, fibroids and prostate adenoma.

• To prepare the ointment, you will need one hundred grams of pine rosin, which must be melted in a water bath and added twenty grams of wax.
• After the wax has dissolved, you need to pour in twenty milliliters of sunflower oil.

When the mixture acquires a homogeneous structure, you need to take a linen napkin, the dimensions of which are ten by fifteen centimeters. You need to apply a warm mixture to it and apply it to the lower abdomen. Shave your hair first. The napkin should remain on the body for three days, then it must be replaced with another one.

The finished ointment should be placed in a jar. It hardens, so it needs to be steamed before each use. A total of eight napkins will be needed for the course of treatment. The solution prepared at a time is enough for four napkins.

Remedy for external hemorrhoids

Heat three tablespoons of refined sunflower oil over low heat until smoke starts to appear, then add four tablespoons of crushed rosin and wait until the mass becomes homogeneous. Lubricate bumps and cracks three times a day until they are completely healed.

Miracle ointment for skin, joint problems and runny nose

The ointment is used to treat any skin diseases, as well as runny nose and joint problems. It should be used in small quantities.

For example, when you have a runny nose, you just need to touch the surface of the ointment with your little finger, spread it on the other little finger and lubricate it in your nose, and then apply a small amount to the wings of your nose. By morning the runny nose will go away.

• To prepare, you will need one tablespoon each of St. John's wort, yarrow, purslane, horsetail, knotweed, linden flowers, acacia and elderberry.
• One teaspoon each of dill, caraway and fennel seeds.
• The plant mixture must be ground using a coffee grinder.
• Place the powder in a container and pour one liter of a mixture of olive, corn and sunflower oils.
• Place in a steam bath and simmer for five hours.
• The product must be removed from the heat, cooled and strained through cheesecloth and squeezed out the grounds.
• Place the oil in the bath again, and when it warms up slightly, add two hundred grams of crushed beeswax and fifty grams of rosin.
• First you need to hard boil three fresh chicken eggs. You need to remove the yolks from them and mash them into crumbs using a fork. It needs to be added little by little to the mixture standing on the fire.
• The ointment will foam a lot. Wait until the foam settles and add a small amount of yolk again. After all the yolks have been added, the ointment must be removed from the heat, allowed to cool slightly and strain through a nylon. Gauze will not work in this case. The finished product is poured into glass jars and stored in the refrigerator, using as needed.

Ointment for healing fistulas

You will need fifty grams of fresh, unsalted lard, the same amount of rosin and wax. Melt the lard over a fire and add wax and rosin, first crushing it into small pieces. After the ointment has dissolved, it must be removed from the heat and cooled. Apply to the affected area, cover with a bandage. Use morning and evening.

For psoriasis

You will need twenty grams of rosin, the same amount of purified sulfur and lamp oil. Boil everything in a water bath until it dissolves. The ointment must be carefully strained and poured into a dark glass jar. Use the ointment to lubricate psoriatic areas in the morning and evening.

Be careful! Rosin is poisonous, so it is not recommended to use it for internal use.

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Source: https://stanki-info.com/kak-rastopit-kanifol-v-domashnih-usloviyah/

Is it better to solder with acid or rosin? — Metals, equipment, instructions

Almost everyone who learned to solder on their own experienced failures at first. Either the solder did not want to stick to the workpieces and parts, or the soldered seam suddenly fell apart.

Without knowing the technology of soldering work, it is difficult to guess why this happens. And the secret is simple - the parts were not prepared for soldering, and the solder did not “stick” to the surfaces. Soldering acid, which removes oxides and promotes an excellent connection, helps to cope with the problem.

Purpose

To prepare parts for applying solder, it is necessary to clean them of particles of foreign materials - dust, sand, water. In addition, it is necessary to remove the oxide film from the surface, which is present on almost all metals.

And if the first condition is easy to cope with mechanically, using a file, needle file, or sandpaper, then the second condition is difficult to fulfill without the use of chemical compounds - an oxide film very quickly appears on the surface of the metal.

Substances that remove film and prevent the formation of a new one are called fluxes, and the most effective of them is soldering acid. It is an active flux, that is, during soldering it chemically affects the composition of the metal surface.

Professionals never question why soldering acid is needed; they know very well that very often it is impossible to complete the assigned tasks without it.

Soldering acid is used for the following metals:

• copper and its alloys;
• nickel;
• iron;
• structural steel;
• alloys of non-ferrous metals.

If copper or brass parts are successfully soldered with borax, then it is often possible to solder aluminum or steel workpieces to each other only using soldering acid. Upon completion of work, the active flux must be washed off with water containing a small amount of alkali.

You can buy acid in stores, or make it yourself using chemical reagents. Although purchasing raw materials can be more expensive than ready-to-use flux.

What does it consist of?

In general, soldering acid is called zinc chloride, but the composition of the substances used in practice is somewhat different. Most often, soldering is done using preparations based on hydrochloric or phosphoric acid with the addition of solvents.

Concentrated hydrochloric acid is not applicable because it corrodes the metal. For electronic circuits, acidic substances are not used, soldering using rosin or choosing another inactive flux.

One of the universal types of liquid flux can be considered soldering acid FCA, produced by chemical industry enterprises.

This drug contains:

• zinc chlorides;
• ammonia (ammonium chloride);
• hydrochloric acid;
• water purified from impurities.

At home, soldering acid is made by dissolving zinc in hydrochloric acid. To obtain satisfactory results, you need to know how to solder metals and alloys with soldering acid, and also strictly follow safety rules when working.

General rules of application

For soldering, tin-lead solder (PLS) is usually used. Its main component is always tin, and lead is added in proportions, depending on which the solder acquires the properties necessary for soldering.

Lead makes the material softer and more fluid, while tin provides strength to the hardened joint.

Despite the presence of lead, the fluidity is often not enough to overcome the surface tension forces in a drop of solder, and with little adhesion to the metal surface, the solder remains in the form of a drop that does not want to stick to the parts.

If the surfaces are first cleaned of oxides, the adhesion force will exceed the forces of surface tension and the solder will spread over the surface, ensuring good adhesion, that is, sticking.

To clean the surface, it is mechanically cleaned using a file or sandpaper and soldering acid is applied. It can be applied with a small brush made of natural materials or with a small spatula.

Often the composition is contained in plastic bottles with dispensers that are convenient to use. The flux must cover the entire surface to be soldered, otherwise the solder will not stick well to it.

During contact of the heated solder with the surface, the soldering acid evaporates, but its presence is no longer required. After the solder is applied, it itself performs a protective function, preventing oxidation. This process is called tinning.

Both soldered workpieces are subject to tinning. After tinning, you can easily connect them by applying additional solder to the joint.

Of course, when soldering with a soldering iron, the tool must also be clean and the tip, made of copper, must not contain oxide films. To do this, the tip must also be tinned first by dipping it while heated in soldering acid and applying solder to it.

Soldering without a soldering iron

Sometimes when soldering using soldering acid, you can do without a soldering iron. One of these methods is used, for example, when soldering twisted wires during electrical installation work on electrical wiring.

In this case, flux is applied to the twist with a brush, and for a better effect, the twist is dipped in a small container with acid. After this, the twist is immersed in a container with molten solder and held for about 1 minute so that the wires warm up well and the solder penetrates to all points of their surface. This soldering provides excellent electrical conductivity when connecting wires.

It must be remembered that when installing printed circuit boards of electronic circuits, when soldering electronic components of radio devices, it is not recommended to use soldering acid, since very thin conductive traces of the boards can be damaged. When applying flux, soldering acid can dissolve them.

Safety regulations

In the production of soldering acid, hydrochloric and phosphoric acids are used. They are very active (although phosphorus is weaker) and easily react with many chemicals. When such substances come into contact with the skin, they cause a chemical burn.

Even when diluted, their vapors can damage the mucous membrane of the sensory organs.

Taking into account the above facts, safety rules when handling soldering acid include secure storage of the drug, the use of protective clothing and gloves, and good ventilation of the work area.

Source: https://spb-metalloobrabotka.com/chem-luchshe-payat-kislotoy-ili-kanifolyu/