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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Stone Drab
Work the goods for 20 minutes in a bath containing 1 ounce peachwood or limawood, 2 ounces logwood and 1/2 ounce fustic; lift, and add 1 ounce copperas in solution; stir well and work in this for 30 minutes; lift out and expose to the air for a short time; wash and dry. Different the general rule that woolens must be worked at a boiling heat.
To dye 5 pounds of woolen goods-work for 20 minutes in a bath with 1 pound ferrocyanide of potassium, and lift; then take 1/2 pint nitrate of iron and add to it 1 ounce crystals of tin (or 1 pint chloride of tin); stir well for a few minutes and then add this mixthis mixture to the bath, and work the goods in this for 30 minutes; wash out and dry. For various shades of color, increase or diminish the quantities in proportion.