Take 1 pint of the violet-black ink and add 1 ounce each of sugar and gum Arabic. This is for what is called moist copying where a press is used. For what is termed dry copying mix about 1/3 pint of glycerine to a pint of any good black ink. The manuscript, if written on glazed paper, will not dry for hours, and will yield one or two fair, neat, dry copies by simple pressure of the hand. The writing should not be excessively fine nor the strokes uneven or heavy. The copies and the original are neater than when water is used.
Gaffard’s Indestructible Ink.
| Lampblack1 | part. |
| Potash water glass12 | parts. |
| Aqua ammonia1 | part. |
| Distilled water38 | parts. |
The potash water glass should be of the consistency of syrup.
Hektograph Ink.
(SEE PAGE [1].)
A good purple ink to use on the gelatine copying pad, or hektograph, is prepared as follows:
| Methyl violet1 | ounce. |
| Water8 | ounces. |
| Glycerine1 | ounce. |
| Alcohol 1/4 | ounce. |
Dissolve the methyl-violet in the water and add the glycerine. Gently warm the solution for an hour, and after cooling add the alcohol.