This section is from the "Henley's Twentieth Century Formulas Recipes Processes" encyclopedia, by Norman W. Henley and others.
It has hitherto been impossible to get a satisfactory application for printing with rubber stamps on rough paper. Fatty vehicles are necessary for such paper, and they injure the India rubber. It is said, however, that if the rubber is first soaked in a solution of glue, and then in one of tannin, or bichromate of potash, it becomes impervious to the oils or fats. Gum arabic can be substituted for the glue.
Copper sulphate.... 20 parts Aniline chlorate .... 20 parts Rub up separately to a fine powder, then carefully mix, and add 10 parts of dextrin and incorporate. Add 5 parts of glycerine and rub up, adding water, a little at a time, until a homogeneous viscid mass is obtained. An aniline color is produced in the material, which boiling does not destroy.
Sodium carbonate . . 22 parts
Glycerine.......... 85 parts
Gum arabic, in powder............. 20 parts
Silver nitrate....... 11 parts
Ammonia water. ... 20 parts Venetian turpentine 10 parts Triturate the carbonate of sodium, gum arabic, and glycerine together. In a separate flask dissolve the silver nitrate in the ammonia water, mix the solution with the triturate, and heat to boiling, when the turpentine is to be added, with constant stirring. After stamping, expose to the sunlight or use a hot iron. The quantity of glycerine may be varied to suit circumstances.
Zinc white.......... 2 drachms
Mucilage........... 1 drachm
Water.............. 6 drachms
Triturate the zinc white with a small quantity of water till quite smooth, then add the mucilage and the remainder of the water.