The appearance of Vat Brown 1(VAT brown BR) is generally dark brown powder, insoluble in water and xylene (cold). It is slightly soluble in tetralin (heat) and xylene (heat), greenish gray in concentrated sulfuric acid, and brown precipitate after dilution.
TRADE NAME:
Vat Navy Brown BR,Vat Brown BR,Vat Brown 2R,Cibanon Brown BR
Key features
- Class: Vat dye (insoluble oxidized form, applied via reduction/oxidation cycle)
- Color: Deep to medium brown shade suitable for earthy and neutral palettes
- Fastness: Excellent wash and light fastness when properly fixed
- Tinctorial strength: High — good coverage at moderate liquor ratios
- Substrate: Optimized for cotton and other cellulosic fibres
- Migration & bleed: Low migration and good wash stability after oxidation
- Chemical stability: Good resistance to alkali and common textile auxiliaries
- Compatibility: Works with standard vat reduction systems (sodium hydrosulfite or alternative reducing systems)
- Finish: Produces level, even shades with appropriate dispersing and wetting agents
- Applications: Apparel cottons, home textiles, industrial/canvas fabrics and specialty finishes
Application of Vat Brown 1:
Vat Brown 1 Mainly used for cotton, hemp, silk and viscose dyeing and printing, cotton yarn dyeing common varieties. Used for polyester/cotton blended fabric two bath dyeing of polyester with little color. The leuco used for dyeing cotton knitwear.
Use condition of Vat Brown 1:
- 1.Jig dyeing and dyeing VAT brown 1 for cotton products, the most suitable b method, applies to c method. Is better to dry cylinder reduction, reduction time 10 ~ 15 min, reduction temperature 40 ~ 50 ℃, the dry cylinder stable time for 40 min.
- 2.It is widely used in cotton suspension pad dyeing, and is also a brown variety commonly used in cotton yarn dyeing.
- 3.VAT brown 1 is rarely used in printing. Printing paste is modulated with strong alkali to get better effect. Discharge printing is only in light color.
- 4.Dye VAT brown BR viscose fiber, low color temperature light, high temperature colored light yellow. Stick to 30 ℃ in cotton blended fabric dyeing, can obtain uniform color; 50 ℃ dyeing, viscose fiber group share color deeper and slant yellow. Dye whalen, red and dark colored light than cotton fiber slightly, poor levelness. Used for cotton blended fabric dyeing, red color is a bit heavy, good levelness. When used in the polyester-cotton (65/35) fabric dyeing, the polyester with color is less, but the thermosol dyeing with disperse dye bath.
- 5.The VAT brown BR printed and dyed fabric was treated with urea formaldehyde or cyanoformaldehyde resin.
Technical Specifications
- CAS NO: 2475-33-4
- CI.NO: 70800
- Molecular Formula: C42H18N2O6
- Molecular Weight: 646.60
- Shade: Red light brown
Dyeing depth g/L | 30 |
Dyeing method | IW IK |
Leuco color | Brown(Y) |
Leveling property | ▲▲ |
Dead cotton | ▲ |
Light (Xenon test 1/12) | 7 |
Light (Xenon test 1/1) | 7-8 |
Light (Xenon test 2/1) | 7-8 |
Application Features
Dyeing Method | Dyeing Tempreture(℃) | VAT Method | VAT Tempreture(℃) | Levelness | Others |
The most suitable method b, also can use c method | 40~50,The Highest 90 | 2/5000
Dry cylinder | 40~50 | Good | — |
Colour Fastness Test
Sun fastness | Soping(95℃) | Perspiration | Rubbing | Ironing | Bleach resistant | Mercerizing |
Standard Depth | 1/12 Depth | Sample change | White stained | Sample change | White stained | Dry | Wet | immediately | After 4h | Chlorine bleaching | Oxygen bleaching | Sample change | White stained |
7~8 | 7 | 5 | 5 | 4~5 | 5 | 4~5 | 3~4 | 4~5 | 4~5 | 4~5 | 4~5 | 4 | 5 |
Packaging & storage (short)
- Packaged in moisture-proof bags or drums
- Store dry, away from heat and direct sunlight
- Keep containers tightly closed to avoid moisture pickup
Precaution
Restore Vat Brown 1 should be stored in a dry and ventilated place sealed.
How is Vat Brown 1 typically applied to cotton?
Vat Brown 1 is applied via the vat dyeing route: reduce the dye to its soluble leuco form in a reducing bath, pad or exhaust the fibre with the leuco solution, then oxidize the fibre to regenerate the insoluble dye. Final rinses and neutralization are required to remove residual chemicals and ensure fastness.
Can Vat Brown 1 be used on blended fabrics (e.g., cotton/polyester)?
Vat Brown 1 is formulated for cellulosics; it will not dye polyester in the same bath. For cotton/polyester blends use a dual system (vat for the cotton portion plus a disperse dyestuff or carrier process for polyester) or pre-treat/stripe the cotton portion separately.
How stable is Vat Brown 1 in storage and what is shelf life?
When kept dry and sealed, Vat Brown 1 remains stable for typical industrial shelf lives (check supplier label). Avoid moisture and heat; store in original packaging and rotate stock by date to preserve performance.
Can Vat Brown 1 be used for pigment/conversion printing or doffer printing?
Vat Brown 1 can be adapted for speciality printing systems that accept vat dyes, but printing recipes must control reduction/oxidation within the print paste and drying/steaming parameters. Consult technical support for optimized paste formulas and after-treatment steps for printing applications.
