164 CHEMISTRY AND PHYSICS OF DYEING Albumin absorbs gallic acid when precipitated by tannic acid or heat. Alcohol prevents this action and also the absorption of tannic acid. In very con- centrated solutions gallic acid precipitates albumin. Xo. i … Xo. 4 Addition of Reagents ABSORPTION OF GALLIC ACID BY COLLOIDS Similar results were obtained when silk or hide powder took the place of albumin, and there seems to be a great similarity in the reactions with these different organic colloids—the curves, so far as they go, indicating that the…
Dyeing · Dyes · General chemistry · Dying · Chemistry
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