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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Patent Dryer
Mix the following ingredients to a paste with linseed oil: 15 pounds dry sulphate of zinc, 4 pounds sugar of lead, and 7 pounds litharge. The mixture should be passed 3 or 4 times through a paint mill. When a tin of this is in use, the surface should be always smoothed down level, and kept covered with a thin layer of linseed oil.