The most cost-effective Vat Brown BR For Dyeing polyester-mixed cotton cloth
Product Specification
| Name | Vat Brown BR |
| Other Name | C.I.Vat Brown 1 |
| Cas No. | 2475-33-4 |
| Appearance | Dark Brown Powder |
| Packing | 25KGS PP Bag/Kraft Bag/Carton Box/Iron Drum |
| Strength | 100% |
| Application | Mainly used for dyeing cotton, viscose fiber, can also be used for leather, silk and so on. |
Description
Dark brown powder is insoluble in water.Good dyeing fastness, bright color, complete chromatography, expensive dyeing process complex. It is used for dyeing cotton, polyester/cotton blended fabrics. It is an important dyestuff for dyeing cotton
Product character
The product character of Vat Brown BR includes:
Physico - chemical property: Dark brown powder. Insoluble in water, xylene (cold), slightly soluble in tetrahydronaphthalene (hot), xylene (hot). It is greenish-gray in concentrated sulfuric acid and produces brown precipitates after dilution. In the insurance powder alkaline solution is yellow light brown, in the acid solution is dark olive.Mainly used for dyeing cotton, viscose fiber, can also be used for leather, silk, paper and so on.
Main features
The main features of Vat Brown BR include:
1.VAT dyes do not contain water-soluble groups, so they are insoluble in water. The molecular structure of the dyes is large, the aromatic ring has good coplanarity, and the affinity for cellulose fibers is large.
2.It is mainly used for dyeing cotton, viscose and other fibers. Dyeing methods mainly include chromophyte dyeing (immersion dyeing) and suspension dyeing (rolling dyeing) : dyed fabrics have good wet fastness, most dyes have high fastness to sunlight, and chromatic acid can be dissolved in alkaline solution and adsorbed by fibers; The cryptochromic bodies (soluble sodium salts of dyes) adsorbed on the fibers return to the original insoluble carbon base (ligand or ketone bodies) state under the action of acids and oxidants, and are fixed in the fibers.
3.The cellulose fibers dyed with VAT dyes are absorbed on the fiber surface in the form of anions through the van der Waals force and hydrogen bond forces between the fibers, and then diffused to the interior of the fibers.
Storage & Transportation
The product must be stored in shade, dry & well-ventilated warehouse. Avoid to be contacted with oxidizing chemicals and combustible organic substances. Keep it away from direct sunlight, heat, sparks and open flames. Carefully handle the product and avoid damaging the package.
Application
Mainly dyed with cotton and polyester-cotton blended fabric; Vinylon can also be painted.
Packing
25KGS Carton Box/25KGS Iron Drums and so on
