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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Gilding by Immersion
Dissolve teroxide or terchloride of gold in a solution of pyrophosphate of soda, and dip the article to be gilt in it. 3590. Gilding and Silvering by Amalgams. For these processes see Nos. 35.32 to 3538. gravity. 3d. Reducing liquid. 50 grammes (771) grains) sulphuric acid (monohydrate), 40 grammes (617 grains) alcohol, 35 grammes (539 grains) water, and 50 grammes powdered manganic peroxide, are distilled into 50 grammes of water until the bulk of the latter is doubled-10 grammes (154 grains) cancsugar, inverted by dissolving in 70 cubic centimeters (gill) water, and boiling with