01020304
Direct Black EX For Dyeing Cotton
Product Specification
Name |
Direct Black EX |
Other name |
Direct Black 38 |
Cas No. |
1937-37-7 |
Appearance |
Deep Black Powder |
Packing |
25KGS Carton Box/Iron Drum/Fiber Drum |
Strength |
100%， 150% |
Application |
Mainly used for dyeing cotton, viscose fiber, can also be used for leather, silk, paper and so on. |
Product Description
Direct black EX, appearance is generally black uniform powder. Good water solubility, green light black soluble in water, slightly soluble in alcohol green light blue black, slightly soluble in soluble fibrin, insoluble in other organic solvents. Deep red blue in concentrated sulfuric acid, after dilution of red sauce to red black precipitate; It is reddish black in concentrated hydrochloric acid; It is yellowish brown in concentrated nitric acid. The aqueous solution with concentrated hydrochloric acid has a sauce red precipitate, and the concentrated sodium hydroxide has a gray blue precipitate.
Product character
The product character of Direct black EX includes:
1：The price is advantageous, the dyeing process is simple, the chromatography is complete, the color is bright
2：It can be directly dissolved in water and has high directness to cellulose fibers
3：Direct Black EX can color protein fibers (such as wool and silk) in weakly acidic or neutral solutions, and are also used in cotton, hemp, rayon, rayon dyeing.
Main features
The main features of Direct Black include:
A.Direct dyes are widely used in dyeing cotton and viscose fibers.
B.This kind of dyestuff has high directness to cellulose fiber and can be dyed directly.
C. Direct dyes are cheap, simple dyeing process, complete chromatography, bright color, the disadvantage is that the wet treatment fastness of dyeing is not ideal, generally through fixing agent treatment to improve, the fastness to sunlight is greatly different with dye varieties.
It is mostly used for dyeing paper，It can also be used for dyeing rayon silk and wool so on.
Direct black EX should be stored in a dry place away from light, which helps to maintain the stability and effectiveness of direct black EX. The light is to prevent the direct black EX from being affected by light, and the dry place is to prevent it from being damp, thus ensuring that its quality and performance are not damaged.
25KGS Carton Box/Iron Drum/Fiber Drum
