This section is from the "Henley's Twentieth Century Formulas Recipes Processes" encyclopedia, by Norman W. Henley and others.
(See also Inks)
The writing to be copied by means of the hectograph is done on good paper with an aniline ink. Formulas for suitable ones are appended. It is said that more copies can be obtained from writing with the purple ink than with other kinds:
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.
A good purple hectograph ink is made as follows: Dissolve 1 part methyl violet in 8 parts of water and add 1 part of glycerine. Gently warm the solution for an hour, and add, when cool, 1/4 part alcohol. Or take methyl violet, 1 part; water, 7 parts; and glycerine, 2 parts.
Methyl violet........ 10 parts
Nigrosin............ 20 parts
Glycerine........... 30 parts
Gum arabic......... 5 parts
Alcohol............. 60 parts
Resorcin blue M..... 10 parts
Dilute acetic acid .... 1 part
Water.............. 85 parts
Glycerine........... 4 parts
Alcohol............. 10 parts
Dissolve by heat.
Fuchsin............ 10 parts
Alcohol............. 10 parts
Glycerine........... 10 parts
Water.............. SO parts
Aniline green, water
soluble........... 15 parts
Glycerine........... 10 parts
Water.............. 50 parts
Alcohol............. 10 parts
Instead of remelting the hectograph composition, which is not always successful, it is recommended to pour alcohol over the surface of the cleaned mass and to light it. After solidifying, the surface will be again ready for use.
 
Continue to: