Hektograph Inks

From the Scientific American Cyclopedia of Formulas, vol II, Standard Literature Co., Calcutta, 1920.
(Being pre-1922 it doesn't tell you how to make insulin from whole sheep, but it has most other things) 

Black -- Methyl violet, 10 parts; nigrosine, 20 parts; glycerine, 30 parts; gum arabic, 5 parts; alcohol, 60 parts.

Blue -- Resorcin blue, M, 10 parts; dilute acetic acid, 1 part; water, 85 parts; glycerine, 4 parts; alcohol, 10 parts. Dissolve with the aid of heat.

Green -- Water-soluble aniline green, 15 parts; glycerine, 10 parts; water, 50 parts; alcohol, 10 parts.

Purple -- Methyl violet, 2 parts; alcohol, 2 parts; sugar, 1 part; glycerine, 4 parts; water, 24 parts. Dissolve the violet in the alcohol, mixed with the glycerine; dissolve the sugar in the water; mix both solutions. 

Red -- Fuchsin, 10 parts; alcohol, 10 parts; glycerine, 10 parts; water, 50 parts.

How to use

The pad having been moistened with clean water, the paper is placed on it, face inward, of course, and rubbed gently but firmly over every portion, care being taken to prevent it changing position. It is allowed to remain on the pad for from 2 to 5 minutes, and is then carefully removed. Copies are now taken by pressing dry paper on this surface and removing immediately. The operation should be carried out with as little interruption as possible. The New Idea states that the distinctness and sharpness of hektograph prints may be very materially heightened by wetting the paper upon which the prints are to be made with alcohol, and removing the excess of alcohol by blotting paper. After using the pad the ink should be removed from the surface immediately with a soft sponge and warm water, drying it well. It will then be ready for another operation. It may be used a great many times, if properly manipulated.


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