Important: Safety Warning
This page contains a formula or preparation using substances now known to be dangerously toxic, such as arsenic, mercury, lead, or cyanide compounds. Exposure to these substances can cause severe poisoning, permanent injury, or death.
In addition, 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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Liquid Green
Dissolve crystallized verdigris in water. Or, dissolve sap green in water, and add a little alum. Or, add tion of litmus, till it turns green. Or, dissolve equal parts of crystallized verdigris and cream of tartar in water, and add a little gum-arabic.
Used as an ink for writing.