Application of dyestuffs to textiles, paper, leather and other materials (1920)
Matthews, J. Merritt (Joseph Merritt), 1874-1931 · New York, Wiley · leaf 525
ed. The solution of the coloring matter for dyeing is best prepared by-boiling the powdered cochineal insects in water and straining the solution. Ammoniacal Cochineal is a preparation obtained by steeping groundCochineal in ammonia water for several days, three parts of ammonia beingused for one… … Fig. 255.—Tentering and Drying Machine for Finishing Cloth. (D. R. Kenyon & Son.) oxide is added, and the heating continued until all of the ammonia isremoved; then the mass is pressed into cakes. It is used for dyeing purpleand crimson, and for rose reds in connection with ordinary Cochineal.…
Dyes and dyeing · Textile fabrics
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