Ink for copying without a press: A regular copying outfit is desirable and most satisfactory for this purpose, but not absolutely essential. Mixing a little glycerine into the ink with which the letter is written will enable the letter to be copied by laying it face downward on tissue paper and rubbing with the hand over the back of the letter. Perhaps a more satisfactory way is to prepare a special ink for this purpose, as follows: Heat one ounce extract of logwood, broken coarsely, and one drachm of carbonate of soda (crystallized) in a porcelain vessel containing 8 ounces of rain water until the solution is of a deep red color; remove from the fire and stir in 1 ounce of glycerine, 15 grains of neutral chromate of potash, dissolved in a little water, and two drachms of a mucilaginous solution of finely pulverized gum arabic. The compression of the letter is taken on thin moistened copying paper, at the back of which is placed a sheet of writing paper.
A good ink for marking tinware is composed of the following: Reduce asphalt or black varnish with turpentine to the desired consistency and keep it in a corked bottle. When you use it shake the bottle and hold varnish side up after withdrawing the cork.
Another ink can be made by reducing shellac varnish with alcohol and adding a sufficient quantity of lampblack. This forms a jet black, lusterless ink, which is insoluble in water, but can be removed by a drop of alcohol. For marking on tin plates, mix together, without the use of heat, 1 part of pine soot with 60 parts of solution of nitrate of copper in water.
Rubber stamps are now in universal use for business purposes, and are used with inks of various colors. These inks anyone may make for himself. They are usually prepared by dissolving aniline colors in water and adding glycerine. An excellent blue rubber stamp ink is made of three parts aniline blue 1 B., 10 parts distilled water, 10 parts pyroligneous acid, 10 parts alcohol, 70 parts glycerine. Rub the blue down with water, add the glycerine gradually, and when the solution is effected add the other ingredients. Other colors can be substituted for blue as follows: Three parts methyl violet; 2 parts diamond juchsin I.; 4 parts methyl green; yellowing, 5 parts Vesuvian B. (brown); 4 parts nigrosin W. (blue-black); omit the pyroligneous acid and use 3 parts eosin BBN for bright red.
A fine ink for stencil marking is made as follows: Sulphate of manganese, 2 parts; lampblack, 1 part; sugar, 4 parts; all in fine powder and triturated to a paste with a little water.
To make ink for writing on steel, tinplate or sheet zinc, mix 1 ounce of powdered sulphate of copper, and 1/2 ounce powdered sal-ammoniac, with 2 ounces of diluted acetic acid, adding lampblack or Vermillion.
An ink for writing on tin is made by the dissolution of 1 part copper in 10 parts nitric acid, to which solution 10 parts of water is added. The tin should be cleaned with dry whiting, and the writing should be done with a quill.