Blue Ruling Ink

Good vitriol, 4 ounces; indigo, 1 ounce. Pulverize the indigo, add it to the vitriol, and let it stand exposed to the air for 6 days, or until dissolved; then fill the pots with chalk, add fresh gall, 1/2 gill, boiling it before use.

Black Ruling Ink

Take good black ink, and add gall as for blue. Do not cork it, as this prevents it from turning black.

Carbon Ink

Dissolve real India ink in common black ink, or add a small quantity of lampblack previously heated to redness, and ground perfectly smooth, with a small portion of the ink.

Carmine

The ordinary solution of carmine in ammonia water, after a short time in contact with steel, becomes blackish red, but an ink may be made that will retain its brilliant carmine color to the last by the following process, given by Dingier: Triturate 1 part of pure carmine with 15 parts of acetate of ammonia solution, with an equal quantity of distilled water in a porcelain mortar, and allow the whole to stand for some time. In this way, a portion of the alumina, which is combined with the carmine dye, is taken up by the acetic acid of the ammonia salt, and separates as a precipitate, while the pure pigment of the cochineal remains dissolved in the half-saturated ammonia. It is now filtered and a few drops of pure white sugar syrup added to thicken it. A solution of gum arabic cannot be used to thicken it, since the ink still contains some acetic acid, which would coagulate the bassorine, one of the constituents of the gum.

Liquid Indelible Drawing Ink

Dissolve, by boiling, 2 parts of blond (golden yellow) shellac in 1.6 parts, by weight, of sal ammoniac, 16°, with 10 parts, by weight, of distilled water, and filter the solution through a woolen cloth. Now dissolve or grind 0.5 parts, by weight, of shellac solution with 0.01 part, by weight, of carbon black. Also dissolve .03 parts of nigrosin in 0.4 parts of distilled water and pour both solutions together. The mixture is allowed to settle for 2 days and the ready ink is drawn off from the sediment.