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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Brunswick Green
Pour a saturated solution of muriate of ammonia then known as purple brown. over copper filings in a close vessel placed 2719. Ivory-Black. Burn shavings in a warm situation; add more of the solution and waste pieces of ivory in a covered crucible, from time to time till 3 parts of the muriate till no more smoke issues. Cover it closely have been used to 2 of copper. After stand- while cooling. It should be afterwards ing for a few weeks the pigment is separated washed with diluted muriatic acid, then with from the unoxidized copper by washing water till no longer acid, dried, and again through a sieve. It is then to be well washed, heated in a covered crucible. It is of a deeper and dried slowly in the shade. It is often color than bone-black, and is used as a pigreduced with white lead; some samples con-ment, a tooth powder, and to decolorize tain arsenic. syrups and other liquids.
DRYING OILS AND DRYERS.