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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To Make Artificial Parchment
De la Rue's patent. Strong unsized paper is immersed for a few seconds in oil of vitriol, diluted with half its volume of water. It is wine), the turpentine and the coloring pigment. The doughy mass is pressed in proper moulds so as to acquire the desired shape, and then dried by stove heat.