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Black Marking Inks

1. – Borax…………….…..       60 parts
Shellac…………………....     180 parts
Boiling water…………...…  1,000 parts

Lampblack, a sufficient quantity.

Dissolve the borax in the water, add the shellac to the solution and stir until dissolved. Rub up a little lampblack
with sufficient of the liquid to form a paste, and add the rest of the solution a little at a time and with constant
rubbing. Test, and if not black enough, repeat the operation. To get the best effect-a pure jet-black-the lampblack
should be purified and freed from the calcium phosphate always present in the commercial article to the extent,
frequently, of 85 to 87 per cent, by treating with hydrochloric acid and washing with water.

2. – An ink that nothing will bleach is made by mixing Pyrogallic acid and sulphate of iron in equal parts. Particularly
useful for marking labels on bottles containing acids. Varnish the label after the ink is dry so that moisture will not
affect it.