Direct Fluorescent Yellow
Direct Fluorescent Yellow is a high-performance fluorescent dye designed for industrial and commercial applications. With its exceptional brightness and stability, this product is widely used in textiles, plastics, safety markings, and specialty printing applications.
Key Features of Direct Fluorescent Yellow
- High fluorescence intensity for maximum visibility
- Excellent lightfastness and weather resistance
- Superior solubility in aqueous solutions
- Compatible with various substrates including cotton, nylon, and polyester
- Environmentally friendly composition
- Meets international safety standards
Technical Specifications
| Parameter | Specification |
|---|---|
| Chemical Name | Direct Fluorescent Yellow 8G |
| Molecular Formula | C32H24N4Na2O8S2 |
| Appearance | Bright yellow powder |
| Solubility (25°C) | >100 g/L in water |
| pH Value (1% solution) | 7.0-8.5 |
| Lightfastness (ISO 105-B02) | Grade 6-7 |
| Washfastness (ISO 105-C06) | Grade 4-5 |
| Moisture Content | ≤5% |
| Particle Size | 90% passing 80 mesh |
Application Guidelines
Direct Fluorescent Yellow performs best under these conditions:
- Dyeing temperature: 40-50°C
- Recommended dosage: 0.5-3% of fabric weight
- Optimal pH range: 7.0-8.5
- Fixation time: 20-30 minutes
- Rinsing temperature: 30-40°C
FAQ about Direct Fluorescent Yellow
Q: What makes Direct Fluorescent Yellow different from conventional yellow dyes?
A: Direct Fluorescent Yellow contains special fluorescent molecules that absorb UV light and emit it as visible yellow light, creating an exceptionally bright appearance that conventional dyes cannot match. This property makes it ideal for high-visibility applications.
Q: How should I store Direct Fluorescent Yellow for maximum shelf life?
A: Store in a cool, dry place away from direct sunlight and moisture. Keep containers tightly sealed at temperatures below 30°C. Under proper conditions, the product maintains its quality for at least 24 months from manufacturing date.
Q: Can Direct Fluorescent Yellow be mixed with other dyes?
A: Yes, Direct Fluorescent Yellow can be blended with compatible direct dyes to create custom colors. However, we recommend testing small batches first as some dye combinations may affect fluorescence intensity. Avoid mixing with cationic dyes as this may cause precipitation.
Safety Information
- Wear protective gloves and eyewear when handling
- Avoid inhalation of dust
- Store away from food and beverages
- Follow local regulations for disposal
- First aid measures: Rinse with water if contact occurs
Additional Properties of Direct Fluorescent Yellow
- Non-flammable composition
- Low volatile organic compound (VOC) content
- Free from heavy metals and restricted substances
- Biodegradable under aerobic conditions