When the effervescence has subsided, enough water is to be added to form a paste of convenient consistence.
Put two pennyworths' lunar caustic (nitrate of silver) into half a tablespoonful of gin, and in a day or two the ink is fit for use. The linen to be marked must first be wet with a strong solution of common soda, and be thoroughly dried before the ink is used upon it. The color will be faint at first, but by exposure to the sun or the fire it will become quite black and very durable.
BLUE MARKING INK FOR WHITE GOODS.
Crystallized nitrate of silver, dram 1 Water of ammonia, drams 3 Crystallized carbonate of soda, dram 1 Powdered gum arabic, drams 1-1/2 Sulphate of copper, grains 30 Distilled water, drams 4
Dissolve the silver salt in the ammonia; dissolve the carbonate of soda, gum arabic, and sulphate of copper in the distilled water, and mix the two solutions together.
BLUE-BLACK WRITING PAPER.
Take of Aleppo galls, bruised, 9 ozs.; bruised
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