Brown mordant for zinc things. simple recipes

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FACTORY TECHNOLOGIES AT HOME - SIMPLE RECIPES
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Brown mordant for zinc things. Simple recipes and tips

Factory technologies - simple recipes

Directory / Factory technology at home - simple recipes

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Brown staining of zinc achieved by repeated lubrication with 4 parts of copper acetate (verdigris) in 11 parts of vinegar. If zinc products are first lubricated with a solution consisting of 1 part of copper sulfate and 1 part of iron sulfate in 20 parts of water, and then after drying with a solution of 4 parts of copper acetate in 11 parts of vinegar and after the operation is polished with crocus, then the surface of things takes on a very beautiful dark -bronze color.

Lubricating zinc things several times with a weak aqueous solution of copper chloride or dichloride and then heating and rubbing them with a brush, the darker the color is obtained, the stronger the solution was used and the more times the lubrication was repeated. After repeated application of the grease, the brown color changes to almost black.

If as much ammonia is added to a solution of copper chloride as necessary so that the precipitate formed at first dissolves again, then from repeated lubrication with such a solution, things turn copper-red. By adding a little vinegar to this solution, they give the color a yellow-brown tint.

A very beautiful brown color is given by a solution of 15 parts of chromic alum and 15 parts of sodium sulphate (hyposulfite) in 500 parts of boiling water; after cooling, 25 parts of sulfuric acid are added to the solution. Then it is filtered and heated to a boil, and then things are immersed in it and kept in it, stirring until they take on the desired shade.

Small zinc items can be dyed brown-bronze by immersing them in a weak solution of copper sulphate, acidified with vinegar. After immersion, things are dried in the air and the immersion is repeated (drying each time) until the dyeing gives the desired shade. The weaker the copper solution, the more often you have to repeat the immersion and the more beautiful and stronger the color.

Author: Korolev V.A.

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