Black Marking Inks

I

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.

II

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.

Colored Marking Inks: Eosine Red

Eosine B............ 1 drachm

Solution of mercuric chloride.......... 2 drachms

Mucilage of acacia. .. 2 drachms

Rectified spirit....... 4 ounces

Oil of lavender...... 1 drop

Distilled water...... 8 ounces

Dissolve the eosine in the solution and 2 ounces of water, add the mucilage, and mix, then the oil dissolved in the spirit, and finally make up.

Orange

Aniline orange.......     1 drachm

Sugar..............     2 drachms

Distilled water to....     4 ounces

Blue

I

Resorcin blue....... 1 drachm

Distilled water....... 6 drachms

Mix and agitate occasionally for 2 hours, then add:

Hot distilled water.. . 24 ounces

Oxalic acid.......... 10 grains

Sugar.............. 1/2 ounce

Shake well. This and other aniline inks can be perfumed by rubbing up a drop of attar of rose with the sugar before dissolving it in the hot water.

II

A solid blue ink, or marking paste, to be used with a brush for stenciling, is made as follows: Shellac, 2 ounces; borax, 2 ounces; water, 25 ounces; gum arabic, 2 ounces; and ultramarine, sufficient. Boil the borax and shellac in some of the water till they are dissolved, and withdraw from the fire. When the solution has become cold, add the rest of the 25 ounces of water, and the ultramarine. When it is to be used with the stencil, it must be made thicker than when it is to be applied with a marking brush.

III

In a suitable kettle mix well, stirring constantly, 50 parts of liquid logwood extract (80 per cent) with 3 parts of spirit previously mingled with 1 part of hydrochloric acid, maintaining a temperature of 68° F. Dissolve 5 parts of potassium chromate in 15 parts of boiling water; to this add 10 parts of hydrochloric acid, and pour this mixture, after raising the temperature to about 86° F., very slowly and with constant stirring into the kettle. Then heat the whole to 185° F. This mass, which has now assumed the nature of an extract, is stirred a little longer, and next 15 parts of dextrin mixed with 10 parts of fine white earth (white bole) are added. The whole is well stirred throughout. Transfer the mass from the kettle into a crusher, where it is thoroughly worked through.