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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Rich Drab
Work for 30 minutes in ounce bichromate of potassa; lift, and add 1 ounce of logwood; work in this for 30 minutes; lift out, wash and dry. Different and, after washing out, work in the decoction of logwood and chamber lye, as in the last receipt, finishing as there directed. quired, follow the same directions, but add a