Reactive Yellow
Reactive Yellow: The High-Performance Dye for Textile Industry
Reactive Yellow is a premium dye specifically formulated for the textile industry, offering exceptional color fastness and vibrant shades. Our product delivers superior performance in cotton, viscose, and other cellulosic fiber applications.
Product Specifications
- Chemical Type: Reactive dye (Vinylsulfone based)
- Appearance: Bright yellow powder
- Solubility: Excellent in water (100g/L at 50°C)
- pH Stability: 6-11 (optimal performance at pH 10.5-11)
- Light Fastness: ISO 105-B02: Grade 6-7
- Wash Fastness: ISO 105-C06: Grade 4-5
- Rubbing Fastness: ISO 105-X12: Dry 4-5, Wet 3-4
| Parameter | Standard Value | Testing Method |
|---|---|---|
| Strength | 100% ± 3% | Spectrophotometric |
| Moisture Content | ≤ 5% | Karl Fischer |
| Water Insoluble Matter | ≤ 0.5% | Filtration Method |
| Dyeing Temperature | 60-80°C | Industrial Standard |
Application Methods
Reactive Yellow can be applied through various textile dyeing processes:
- Exhaust dyeing (batch process)
- Continuous dyeing (pad-dry-steam method)
- Semi-continuous dyeing (pad-batch process)
Reactive Yellow FAQ
Q: What makes Reactive Yellow different from other yellow dyes?
A: Reactive Yellow offers superior brightness and color yield compared to conventional yellow dyes. Its unique chemical structure provides excellent covalent bonding with cellulose fibers, resulting in outstanding wash fastness and durability. The dye maintains its vibrancy even after repeated laundering and exposure to sunlight.
Q: What is the recommended salt concentration when using Reactive Yellow?
A: The optimal salt concentration depends on the dyeing method and depth of shade. For medium shades (2-4% owf), we recommend 40-60 g/L of Glauber's salt (sodium sulfate). For heavy shades (above 4% owf), increase salt concentration to 60-80 g/L. Always dissolve the salt completely before adding Reactive Yellow to ensure even distribution.
Q: How should Reactive Yellow be stored to maintain quality?
A: Store Reactive Yellow in its original packaging in a cool, dry place away from direct sunlight. Maintain storage temperature below 30°C with relative humidity below 65%. Keep containers tightly sealed to prevent moisture absorption. Under proper conditions, the dye maintains its quality for at least 24 months from production date.
Environmental Considerations
Reactive Yellow meets international environmental standards including:
- OEKO-TEX® Standard 100 Class I (for babywear)
- REACH compliance (EU regulation)
- ZDHC MRSL conformance
Recommended Dyeing Recipe
| Component | Light Shade | Medium Shade | Heavy Shade |
|---|---|---|---|
| Reactive Yellow | 0.5-1% owf | 1-3% owf | 3-6% owf |
| Sodium Sulfate | 20-30 g/L | 40-60 g/L | 60-80 g/L |
| Sodium Carbonate | 5-10 g/L | 10-15 g/L | 15-20 g/L |
| Liquor Ratio | 1:10 to 1:20 (recommended 1:15) | ||
Color Matching
Reactive Yellow can be combined with other reactive dyes to achieve various shades:
- Combine with Reactive Red for orange shades
- Mix with Reactive Blue for green shades
- Blend with Reactive Black for olive and khaki tones