direct red 23#

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direct red 23#
Posting date : Dec 02, 2009
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32-
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Purple-red powder. Soluble in water was red and blue to magenta, insoluble in ethanol and soluble fiber element, insoluble in other organic solvents. Case of concentrated sulfuric acid was blue, diluted red to purple was blue; case of concentrated nitric acid was blue. Dye solution, case of concentrated hydrochloric acid purple precipitate; case of concentrated sodium hydroxide solution was red purple. Case of copper, iron, a slight change in shade. More for viscose fabric dyeing, a small amount for printing. Move dyeing and leveling is poor, and the quality of hiding bad viscose uneven, but very good dyeing rate can be used for silk, wool and fabric dyeing and printing. Dyeing polyester with disperse dyes with bath / sticky when blended with a high temperature high pressure method or vectors can be. Can be used for dyeing leather and paper.

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