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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To Frost Silver (Produce a frosted surface upon)
To produce a frosted surface upon polished silver use cyanide of potassium with a brush; the silver should not be handled during the process, but held between pieces of boxwood or lancewood. The proportion should be, 1 ounce of cyanide of potassium in 1 pint of water.