_Fireproof Ink._—Fireproof ink, which can be used either for writing or printing:—Copal 12 grains, graphite 22 drachms, sulphate of iron 2 drachms, tincture of nut-galls 2 drachms, and sulphate of indigo 8 drachms; these are thoroughly mixed and boiled in water, and the ink so obtained is said to be both fireproof and insoluble in water. When any other colour than black is desired, the graphite is replaced by any other mineral pigment of the required colour. * * * * * _Printing Ink Varnish._—Printing ink varnish is made by adding 4 oz. of boiled linseed or neat’s-foot oil to 6 oz. of yellow rosin. * * * * * _Lithographic Transfer Ink._—Three parts gum copal, 5 parts wax, 5 purified tallow, 4 soap, 5 shellac, 5 mastic, and one-half part sulphur. The copal is to be melted in a copper vessel, mixing in a little sweet oil, add the wax and tallow, and when these are well melted, light the mass and throw in the soap, well dried and cut in small pieces, then the shellac and mastic. The flame is to be increased by the addition of the flowers of sulphur, and so a perfect mixture of the copal with the other substances will be attained. The flame is to be alternately kindled and extinguished till the whole mass is reduced to one-fourth of its former bulk. * * * * * _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.