Henley's Twentieth Century Formulas, Recipes and Processes by Unknown
Author:Unknown
Language: eng
Format: epub
Tags: Chemistry, Technical, Industrial arts, Formulas, recipes, etc.
Published: 2016-09-24T16:00:00+00:00
Purple Ink.
—I.—A strong decoction of logwood, to which a little alum or chloride of tin has been added.
II. (Normandy).—To 12 pounds of Campeachy wood add as many gallons of boiling water. Pour the solution through a funnel with a strainer made of coarse flannel, or 1 pound of hydrate, or acetate of deutoxide of copper finely powdered (having at the bottom of the funnel a piece of sponge); then add immediately 14 pounds of alum, and for every 340 gallons of liquid add 80 pounds of gum arabic or gum senegal. Let these remain for 3 or 4 days, and a beautiful purple color will be produced.
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