Reactive Black: The Professional Choice for High-Performance Dyeing
Reactive Black is a premium reactive dye solution designed for textile professionals who demand consistent quality and exceptional color fastness. Our formula delivers deep, rich black shades that remain vibrant through repeated washes and exposure to light.
Technical Specifications
- Chemical Class: Vinyl sulfone based reactive dye
- Appearance: Black powder
- Solubility: 100g/L at 50°C
- pH Stability: 6-11
- Light Fastness: ISO 105-B02: 6-7 (1-8 scale)
- Wash Fastness: ISO 105-C06: 4-5 (1-5 scale)
- Rubbing Fastness: ISO 105-X12: 4 (dry), 3-4 (wet)
| Parameter | Value |
|---|---|
| Dyeing Temperature | 60-80°C |
| Fixing Temperature | 80-90°C |
| Dyeing Time | 30-60 minutes |
| Salt Concentration | 30-80 g/L |
| Soda Ash Concentration | 5-20 g/L |
| Liquor Ratio | 1:5 to 1:20 |
Reactive Black FAQ
What makes Reactive Black superior to other black dyes?
Reactive Black offers exceptional color yield and penetration, resulting in deeper shades with less dye consumption. Our proprietary formulation provides excellent exhaustion rates (typically 85-90%) and fixation rates (70-75%), reducing both dye waste and processing costs. The molecular structure ensures superior bonding with cellulose fibers for long-lasting color retention.
How should I store Reactive Black for optimal shelf life?
Store Reactive Black in its original sealed packaging at room temperature (15-30°C) in a dry environment away from direct sunlight. Under proper conditions, the powder maintains its full effectiveness for 24 months from production date, while solutions should be used within 48 hours of preparation to ensure maximum dyeing performance.
Application Guidelines
For best results with Reactive Black, follow these professional application methods:
- Prepare dye bath at 40°C with required salt concentration
- Add pre-dissolved dye solution and circulate for 10 minutes
- Gradually raise temperature to 60-80°C over 30 minutes
- Add alkali (soda ash) in two stages for even fixation
- Maintain dyeing temperature for 30-45 minutes
- Rinse thoroughly with cold water before soaping
| Feature | Reactive Black | Standard Black Dye |
|---|---|---|
| Color Depth | Superior (1.5× deeper) | Standard |
| Wash Fastness | Grade 4-5 | Grade 3-4 |
| Salt Requirement | 30% less | Standard dosage |
| Environmental Impact | Low effluent load | Higher COD levels |
More Reactive Black Questions
Can Reactive Black be used for printing applications?
Yes, Reactive Black is formulated for both exhaust dyeing and printing applications. For printing, we recommend using our specially optimized print paste formulation (Reactive Black PX) which contains modified thickeners for sharper print definition. The standard powder can be used at 3-8% concentration depending on desired shade depth, with urea (50-100g/kg) added to the print paste for optimal fiber penetration.
Environmental Compliance
Reactive Black meets international environmental standards:
- ZDHC MRSL compliant
- OEKO-TEX® Standard 100 certified
- REACH registered
- No heavy metals or banned amines
- Biodegradability: >80% in 28 days