C I Vat Green 1 Brilliant Green Natural Indigo Dye Powder CAS
1. Product Specifications
light fastness(xenon test)
Dissolution in water
Not dissolved in water
dry rubbing fastness
wet rubbing fastness
2. Product advantages
1.1 Excellent fastness in each index
1.2 Granule fineness
1.3 Exterior fineness
(1)Cotton yarn, cotton, wool or silk dyeing
(2)Viscose fiber paste coloring and printing and dyeing.
(3)Biochemical agents and indicators
Inner: plastic bag
Outer: carton box or plastic drum (optional)
1*20GP=11 MT with Pallet
Packing details can be adjusted according to requirement.
1. About Samples
Arrange production---samples confirmation---counter
Offer sample---sample conformation---arrange production
2. Samples Mailing
Free sample would be sent within one week once confirmed with
3. Sales Network
Our products have been exported to 52 countries in North America,
South America, Europe, Middle East, Southeast Asia, Africa etc.
We’ve established good and stable relationships with all our
Vat dyes dyeing process
Vat dyes do not dissolve in water, while when reduced to be leuco
salt by reducing agent under alkaline conditions, they can dissolve
in water and get feature of immediacy with cellulose fibers, which
is the way to achieve the purpose of dyeing. Then stable shade and
good color fastness would come out via oxidation and soaping.
1. Reduction of dyes
Insoluble reducing dye will change into soluble leuco.
Different levels of the best staining methods are brought out
according to the reduction dyes’ reduction potential and level of
its immediacy to fibers.
2. Dye-uptake of leuco
The leuco is absorbed by fiber and then it is diffusing into the
It is necessary to use soft water or softened water in dyeing
process. Hereby it is suggested to add the water softener for 1g/L
to some poor quality cotton calcium, magnesium ions, but also the
iron, copper ions which are absorbed by the pipe into the dye bath,
and finally keep the solubility of leuco.
The sodium sulfate could increase the dyeing absorption rate, and
surely it is also a good promoter. So it can be added into the dye
baths with medium or low immediacy according to the demand.
Referring to 3.13.
3. Leuco Oxidizing
The leuco absorbed by fiber is oxygenated and changed into the
former insoluble vat dyes, then it colors.
Scour them in 2-3 baths with soft ware before oxygenation, avoiding
to be oxygenated with alkali.
Hydrogen peroxide is most suitable for suspension padding, while
after oxygenation, it should be in soap boiling immediately without
The sodium perborate is mild in very widely use. It can be bathed
with the next procedure (referring to soap boiling).
4. Soaping treatment
The stable shade and good color fastness would come out via soap
Through high-temperature soap boiling, the floating color can be
removed and the crystallization of vat dyes on fabric would be
enhanced, so the fastness is increased, the stable and full color
The soap lotion which is compounded by nonionic and containing
chelating agents plays a better role in color light promoting.