Important: Safety Warning
This page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
This information has been left in for historical purposes but should not be acted upon.
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Beautiful Red Enamel
The most beautiful and costly red, inclining to the purple tinge, is produced by tinging glass or and calcined iron, of each 1 part; antimony, flux with the oxide or salts of gold, or with litharge, and sand, of each 2 parts; mix and the purple precipitate of cassius (see Nos. add it in any required proportion to a flux, according to the color desired. A little oxide of cobalt or zaffre is frequently added, and alters the shade of brown.
II. Manganese, 5 parts; red lead, 16 parts; flint powder, 8 parts; mix.
III. Manganese, 9 parts; red lead, 34 parts; flint powder, 16 parts.