To give dark Printing Inks a Bronze or Changeable Hue.—Take 1½ lb. gum shellac and dissolve it in 1 gallon 95 per cent. alcohol spirits of cologne for 24 hours; then add 14 oz. aniline red; let it stand a few hours longer, when it will be ready for use. Add this to good blue, black, or other dark inks, as needed, in quantities to suit, when, if carefully done, they will be found to have a rich bronze or changeable hue.
An Ink for Marking Tin or Zinc.—An ink composed of copper one part, dissolved in ten parts nitric acid, ten parts water being afterward added, is useful for marking on tin or zinc.
Quick-drying Preparations for Printers’ Inks to be used on Bookbinders’ Cases.—1 oz. beeswax, ¼ oz. gum-arabic dissolved in sufficient acetic acid to make a thin mucilage, ¼ oz. Brown’s Japan, ½ oz. asphaltum varnish. Incorporate with 1 lb. of wood-cut ink.
A Dryer.—No. 1, for fine job work. Damar varnish 6 oz., bergamot 2 drachms, balsam copaiba 2 drachms, balsam of fir 3 oz., creosote 1 drachm, copal varnish 1 drachm. To enough ink for 1000 ordinary business cards, add from 8 to 12 drops of the “Indispensable,” and to larger quantities in proportion. When used for bronze, dry colours, diamond printing, etc., take twice the quantity; and where an extra quick dryer is desired, add a few drops of dissolved gum-arabic to the ink, after it has been mixed with No. 1. In all cases, mix well with the ink before applying to the rollers.
Dryer.—No. 2.—For news and poster ink. Spirits of turpentine 1 qt., balsam copaiba 6 oz. Add a sufficient quantity to the ink to thin it to a proper consistency for working.