Vat Orange 11 is Yellow powder. Slightly soluble in 2-Chlorophenol and Pyridine , insoluble in Etanol, Acetone, Chloroform and Toluene. The strong sulfuric acid to red light brown, dilute light yellow brown after precipitation. Alkaline reduction for dark red light body hidden color brown; Acid reduction for yellow color body hidden. The light is fragile.
Vat Orange 11(Vat Yellow 3RT) appearance is generally yellow powder. It is insoluble in water, alcohol, acetone, chloroform and toluene; slightly soluble in o-chlorophenol and pyridine. It is reddish brown in concentrated sulfuric acid and has a brownish yellow precipitate after dilution. The dye is in alkaline powder solution. The resulting leuco body is dark reddish brown, and the acid powder solution is dark yellow.
TRADE NAME:Vat Yellow 3RT,Vat Orange 3RT,Cibanon Yellow 3R
Dyeing depth g/L | 20 |
Dyeing method | IN IW |
Leuco color | Brown(Y) |
Leveling property | ▲▲ |
Dead cotton | ▲ |
Light (Xenon test 1/12) | 6 |
Light (Xenon test 1/1) | 7 |
Light (Xenon test 2/1) | 7 |
Dyeing Method | Dyeing Temperature(℃) | Reduction Method | Reduction temperature(℃) | Leveling Property | Other properties |
most suitable method B, also used method of A and C | 40~50,MAX90 | Dry Cylinder | 50 | Good | — |
Light Fastness | Soapping(95℃) | Perspiration | Rubing | Ironing | Bleaching resistant | Mecerized | |||||||
standard depth | 1/12 depth | orginal color changed | white fabric stained | orginal color changed | white fabric stained | Dry | wet | Immediatly | 4hafter | Chlorine bleaching | Oxygen bleaching | Orginal color chagned | white fabric stained |
6~7 | 6 | 5 | 5 | 4~5 | 4~5 | 4~5 | 4 | 3 | 5 | 4~5 | 4~5 | 5 | 5 |
Vat Orange 11 Mainly used for dyeing cotton roll and dip, the affinity of cotton cloth is good and the levelness of death and the covering power of cotton are good. Can to cotton direct printing. with Villeneuve shade of Pale, coloured silk high affinity, good fastness. Besides using background color outside, a small amount used to spell color. Sometimes also used for paper dyeing.
1.When used for cotton product dyeing or dip dyeing, it is suitable to use B method, and can also use method A and method C. Dry cylinder reduction temperature is 50 °C, it takes 10~15min, dry cylinder stabilization time is 50min. When dyeing, it is necessary to add salt to promote dyeing.
2.The leuco body has higher affinity for cotton fiber and good leveling property. The dyeing curve is shown in Figure 4-5-13. It has good hiding power for dead cotton. In addition to suitable for dyeing and dip dyeing, Suitable for suspension padding and so on.
3.It is suitable for direct printing of cotton fabrics. When adjusting the printing paste, it is necessary to add 50g/L of cosolvent TD to fully color the color. The color of the printing is generally not as bright as the dyed color.
4.When the Vat yellow 3RT dyed vinylon is reduced, the color is not as bright as the dyed cotton, and the color is light.
5.Vat Orange 11 After printing and dyeing the fabric, the color change is minimal.
Vat Orange 11 should be stored in a dry, ventilated place to avoid moisture
Vat Orange 11 is applied by reducing the dye to its soluble leuco form (commonly with a sodium hydrosulfite/caustic system), exhausting or padding the reduced solution onto the fiber, and then oxidizing it back to the insoluble vat form on the fabric. The process produces strong, wash-resistant shades when reduction/oxidation are well controlled.
Vat Orange 11 is optimized for cellulose fibers such as cotton, rayon and viscose. Recommended processes include package/yarn dyeing, pad-batch (pad-steam or pad-batch), and vat printing. It can also be used in blend shading where vat dyes are standard.
Compared with direct and many reactive oranges, Vat Orange 11 delivers superior wet and light fastness because it becomes insoluble on the fiber after oxidation. Reactive dyes give bright initial shades and easy application but typically have lower wet-fastness; direct dyes are simpler but less durable in heavy-use textiles.
Yes. Vat Orange 11 blends well with other vat dyes for shade tuning, but compatibility and final fastness depend on the partner dye’s properties. Conduct lab trials for dye balance and oxidation behavior before scaling to production.
Proper oxidation and thorough washing to remove residual reducing agent are critical. Afterwash with mild detergent and sequestering agents improves crocking resistance. For improved brightness, anti-yellowing or optical brighteners may be used cautiously—test for compatibility with vat dye chemistry.
Maintain correct pH and temperature during reduction; avoid over-reduction which can cause dye hydrolysis. Ensure complete oxidation (air or hydrogen peroxide can be used) and rinse well to remove reducing residues—otherwise fastness will be compromised.
Vat dyeing involves reducing agents and alkali; treat machine effluent to remove sulfite/sulfide residues and adjust pH before discharge. Consider closed-loop water systems and appropriate biological/chemical treatments to minimize environmental impact.
Perform wash, crocking, perspiration and lightfastness tests per relevant standards (AATCC/ISO). Also measure shade consistency (spectrophotometer readings), residual reducing agent level, and tensile/hand feel changes to ensure product quality.
