Advice 1: How to clean silver coins

Vintage silver coin is a pride for the coin collector. As a rule, to bring the antique coins in the form close to the original, it must be cleaned of traces of oxidation and dirt. This can be done in several ways. Choosing the right method depends on standard silver.
How to clean silver coins
You will need
  • the solution of ammonia;
  • the juice of a lemon;
  • acidic fixer;
  • the tool Silberrad";
  • baking soda.
The easiest way to remove ordinary dirt. Prepare a bowl of soapy water. The water should be slightly warm. Drop a coin in a bowl and gently give it a RUB with a soft brush.
The following method of purification from oxidation suitable for coins any sample. It is the most simple and accessible to everyone. Take ordinary baking soda and dilute it with water in the ratio 1:1. Heat the solution on the stove. Put your coins in the soda solution for three hours. If the contamination is not completely removed, dilute with soda water to a pulp and use it to wipe the areas needed coins. This mixture must not contain solid particles that could scratch the metal.
For high-grade silver coins there are several cleaning methods. To high the sample will include about 750 and more. Such coins can be cleaned with ammonia solution. Alcohol is sold in any pharmacy at a small price. Drop a coin in the solution for some time. The exact time of stay of the product in solution is difficult to give. Periodically remove the silver from the ammonia, and check the quality of cleaning visually. Also, to rid the coin of oxides by using the fixer. It is sold in the store for photo enthusiasts. Professional restorers recommend using German means "Silverbar", which is specially formulated for cleaning silver jewelry.
To clean the base silver coins use natural lemon juice. Fill a glass Cup of lemon juice to half. Immerse the coins fully into the solution. Ensure that the edges of the coins did not go beyond the liquid. If the metal part will be on air on border of contact with the juice will be oxidized. Subsequently, to remove this type of oxidation will be very difficult. Do not remove coin from solution until then, until the oxide is completely dissolved. Cleaned rinse the coin in running water and dry thoroughly.

Advice 2 : How to clean a silver coin

Cleaning silver coins is a method of removing from the surface of the particles of soil, dust or traces of metal oxidation.There are several ways safe and easy to clean silver coin.
How to clean a silver coin
You will need
  • - the soft brush or the brush;
  • - ammonia;
  • - baking soda;
  • - toothpaste;
  • - A 10% solution of Trilon B;
  • - Laundry soap;
  • - lemon juice;
  • - a means of household chemicals with hydrochloric or oxalic acid (for example, and Silit Silit Bang).
If the silver coin is just contaminated with dust or dirt, it should be cleaned under warm running water using a soft brush or a simple toothbrush.
For silver coins, it is desirable to know the fineness of coin silver. Because of the sample will depend on the cleaning method.
To clean silver coin high grade can be a slurry of ammonia - it is sold in any pharmacy, baking soda and toothpaste. Such a mixture must be liquid and not contain solid or abrasive particles. Toothpaste is better to use domestic production, because it contains silicon oxide, it leaves no macrocarpon, in contrast to the calcium carbonate contained in the foreign toothpastes.
For cleaning silver coins low sample most suited a 10% solution of Trilon B. It must be applied with a brush with soft bristles and a little RUB, then rinse the coin under running water, dry.
Another effective way to clean the base silver coins - dip the coins in warm water with dissolved soap or in a solution of lemon juice. In this case, the coins need to be fully immersed in the used solution. They should not be in contact with the air. The coins are periodically required to turn in solution.
The easiest way of dealing with oxides is wipe the baking soda. Baking soda is necessary to moisten with water and wipe her a silver coin to remove the oxides.
Some numismatists use household chemicals with hydrochloric or oxalic acid. Such remedies dissolve oxides in a couple of minutes, but destroy a dark patina, making the coin shiny.
When cleaning silver coins cannot be used:
1. Concentrated solutions of sulfuric, acetic, hydrochloric or nitric acids. They melt the mint on the coin;
2. Building skins. They removed coins "patina" and stamp;
3. The method of temperature difference, when the silver coin is heated on the fire, and then make it sudden cooling in cold water. This leads to loss of the coin "patina";
4. Brushes with metal bristles. They take a picture of the coin and "patina".

Advice 3 : How to clean copper coins and bronze products

Old copper coins and bronze objects are found not only in museums and private collections, sometimes they just get from grandparents or suddenly found in older apartments and houses. Unfortunately, time is cruel to such an active metal, such as copper and its alloys, and things look not so beautiful. However, their hard brilliance is still possible to return.
How to clean copper coins and bronze products
You will need
  • - solution of ammonia;
  • - a drug called Trilon-B;
  • - mineral oil;
  • - toothpaste;
  • - cleaner (e.g., Drano);
  • - canvas.
If you find old copper coins, covered with an even layer of patina (greenish patina formed by oxidation of copper), it is possible you don't clean it because the patina is a natural protection of the metal from the environment, and the price of the coins from coin collectors not affected. From the patina can be removed by placing the coin in a 10% solution of ammonia. Thus it is necessary to watch, that the coin was completely hidden solution, as the contact of ammonia with air can damage the metal. After the green coating will change color to white, the coin can be dipped in vegetable oil and wipe with a dry cloth.
Blackened copper coin or piece of bronze can be cleaned with a solution of the drug under the name of Trilon-B (disodium salt of ethylenediaminetetraacetic acid). Unlike acids, it affects only the oxides without damaging the metal itself. Depending on the state of the object the validity period can vary from several minutes up to 5-7 hours. After treatment with Trilon-B coin should be rinsed with clean water and wipe.
One of the most humane ways to clean copper or bronze is to boil it in paraffin oil, which you can buy at the pharmacy. Cleaning is enough to hold a coin in boiling oil for 10-15 minutes. Be careful, get a coin only after the oil has cooled sufficiently. After this bathing, the coin a few minutes to boil with a washing powder or detergent to get rid of oily residue.
The option recommended by restorers for heavily soiled coin: hold the coin for 1 minute in the cleaning solution, and then boil the soap flakes with water and place coins in a soapy solution for 2-4 weeks, periodically removing them and cleaning with a toothbrush. At the end of the coins should be boiled in sunflower oil for about 10 minutes and wipe with a linen cloth.
When used for cleaning bronze of ammonia will darken metal. In order to return the product the original color, rinse it with warm water and toothpaste.
Useful advice
Do not clean coins strong acids as they can damage the coins.
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