Gold Lac for Metal Wares.

Practical Magazine 13, 1876

(Chemistry applied to the Arts, Manufactures, &c. Metallurgy.)

A gold lac, remarkable for its great hardness and beautiful colour, on being analyzed by Dr. R. KAYSER at Nürnberg, gave as its constituents picric acid and boracic acid. Thereupon a clear shell-lac solution was mixed with picric acid and about half per cent. of crystallized boracic acid, each being previously dissolved in alcohol, and the resulting lac possessed all the advantages of the former one.

- Bayerisches Industrie-und-Gewerke Blatt, Oct. 1875.

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