Most inks for glass will also write on celluloid and the metals. The following {404} I and II are the most widely known recipes:
I.—In 500 parts of water dissolve 36 parts of sodium fluoride and 7 parts of sodium sulphate. In another vessel dissolve in the same amount of water 14 parts of zinc chloride and to the solution add 56 parts of concentrated hydrochloric acid. To use, mix equal volumes of the two solutions and add a little India ink; or, in the absence of this, rub up a little lampblack with it. It is scarcely necessary to say that the mixture should not be put in glass containers, unless they are well coated internally with paraffine, wax, gutta-percha, or some similar material. To avoid the inconvenience of keeping the solutions in separate bottles, mix them and preserve in a rubber bottle. A quill pen is best to use in writing with this preparation, but metallic pens may be used, if quite clean and new.
II.—In 150 parts of alcohol dissolve 20 parts of rosin, and add to this, drop by drop, stirring continuously, a solution of 35 parts of borax in 250 parts of water. This being accomplished, dissolve in the solution sufficient methylene blue to give it the desired tint.
Ink For Writing On Glazed Cardboard.
I.—Dissolve 4 drachms of brown shellac in 4 ounces of alcohol. Dissolve 7 drachms of borax in 6 ounces of distilled water. Pour the first solution slowly into the second and carefully mix them, after which add 12 grains of aniline dye of the desired color. Violet, blue, green, red, yellow, orange, or black aniline dyes can be used.
Such inks may be used for writing on bottles, and the glass may be cleaned with water without the inscription being impaired.
| II.— | Ferric chloride | 10 parts |
|---|---|---|
| Tannin | 15 parts | |
| Acetone | 100 parts |
Dissolve the ferric chloride in a portion of the acetone and the tannin in the residue, and mix the solutions.
III.—Dissolve a tar dyestuff of the desired color in anhydrous acetic acid.