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.