Direct Dyes Black 56 for Paper Dyeing

Product Description

Product Name: Direct Black 56
C.I. No.: 34170
CAS No.: 8003-57-4
Molecular Formula: C36H22N7Na3O10S3
Molecular Weight: 877.77
Shade: red light grey. Gray powder.

Relative Name:
Direct Light Fastness Gray LBN,Direct Light Fastness Gray LRN,Direct Gray L-8BR;

Direct Direct Black 56 Physical Properties and light fastness, solubility.

Direct Black 56
Dyeing depth %	2
Insolubles %	0.15
Light Fastness	4-6
Washing Fatness	2
Rubbing fastness(dry)	4
Rubbing fastness(wet)	3

Direct Direct Black 56 Properties:red light grey. Gray powder. Soluble in water for dark purple, not soluble in alcohol. The strong sulfuric acid in the green light for gray blue, diluted into purple. The dye solution to join strong hydrochloric acid have precipitation of dark; Add thick, hydrogen oxidation solution have dark purple precipitation. Cellulose fiber of dyeing, the dye well after sex is good, in the 80 ºC temperature when the biggest affinity. Discharge sex is good, hard to sensitive. For the red light gray color. Dye in bath of copper, iron ion colored light basic unchanged, the SDC classification for a class B. Neutral and alkaline white are 5 levels.

Applications:
Mainly used for cotton, linen, silk, cellulose fiber fabrics such as glue the dyeing. Can also be used for leather, paper all the dyeing.

Note: The data contained here are based on our current knowledge and experience. It is the responsibility of user to test our products before the final application.
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