How to regenerate patina after washing silver dollar?

The natural method of silver patina is put into drawers, bed bottoms and wardrobe clothes; Chemical methods include chemical sealing and heating.

There is still a difference between post-culture patina and century-old natural patina. This must be clear. After washing the silver dollar, the recovered patina belongs to the post-culture patina. There are many ways to make patina, such as putting it in drawers, under beds, clothes pockets in wardrobes, or adding chemicals to seal it and heat it quickly.

If you want to know how to regenerate patina, you must know the principle of silver dollar forming patina, as follows:

1, the chemical properties of metallic silver are relatively stable.

2. Over the years, metallic silver will also be oxidized, from silvery white to purple until it becomes black. Under general preservation conditions, the surface of the old silver dollar will form a deep purple rust color, and there are patina colors such as iron red, patina and lead black because of the environment and preservation conditions.

The value of the silver dollar is judged as follows:

1, the grade of the old silver dollar is determined according to its wear degree, and the patina is formed by the conditions of use and preservation, the year of environmental use, etc. And the patina is not directly related to the degree of wear of coins.

2. The patina has the characteristics of checking the authenticity and historical evidence, which will not reduce the grade value of the old silver dollar, but will preserve and increase the value of the old silver dollar.

3. The method of removing the patina is wrong, which will damage the surface of silver coins and reduce the grade value.

The general preservation method of silver dollar after patina is as follows:

1. Wrap the silver dollar with printed white paper and put it in a plastic bag or buy a special box for storing old coins.

2. Less collision and less wear of old coins is the best way to preserve them.