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Lithographic Transfer Ink

Melt together 8 parts white wax and 2 parts tained from coal tar (not from petroleum). In white soap; and, before they become hot preparing nitro-benzole on a large scale, 12 parts benzole are mixed with 13 parts fuming with a reddish tinge; but by the addition of nitric acid, and 8 parts oil of vitriol, in a cast some organic substances, acetic acid, and meiron apparatus. The character of the product thylic alcohol, pure blue is obtained. It is dis-- depends greatly on the purity of the benzole, tinguished from all other blues by not appearand also on the management of the reaction. ing green in candle light. The various The conversion of nitro-benzole into aniline is, by Béchamps' process, performed in iron tanks, heated by steam, and provided with stirrers, and a still-head to collect the distillates. The tank or still is charged with 100 parts nitrobenzole, 150 clean wrought iron filings, 100 water, and 150 acetic acid; when these are mixed spontaneous heat is evolved, which causes some of the liquid to pass into the condensers, whence it is returned to the tank. shades of purple to blue and violet are made from fuchsine by Hofmann's method (see No. 2608), heating 1 part fuchsine and 2 iodide of ethyl with 2 parts alcohol in a closed vessel at 212° for variable lengths of time; the blue resulting from longest exposure.