Dreher's casein varnish. simple recipes

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FACTORY TECHNOLOGIES AT HOME - SIMPLE RECIPES
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Dreher's casein varnish. Simple recipes and tips

Factory technologies - simple recipes

Directory / Factory technology at home - simple recipes

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The wonderfully beautiful bright yellow color of cadmium is possessed by the invented Dreher varnish prepared as follows: infuse 10 parts of casein powder in 100 parts of water, to which 1 - 1,5 parts of ammonia (ammonia) are added at 40 ° C. Then prepare a solution of aureolin by diluting 5 parts of this paint in 1000 parts of water at 60 °C. After this, 300 parts of finely ground kaolin are mixed with 20 parts of lukewarm water and 80 parts of casein solution and the resulting batter is mixed with 100 parts of aureolin solution; then add dropwise about 2 parts of a solution of tin tetrachloride (10 parts of salt per 1000 parts of water). In this case, the varnish cools and is suitable for use after drying at 60 °C.

In a similar way, casein varnishes can be prepared with the addition of any aniline paint, and instead of tin tetrachloride, aluminum chloride and aluminum acetate, tin acetate, etc. can be used.

All casein varnishes are distinguished by their durability and remarkably beautiful shades of color. It can be expected that they will find wide application in lithography, wallpaper printing and other similar industries.

Author: Korolev V.A.

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