Direct Orange Dyes
Bright & Consistent Coloring for Cellulosic Fibers
Orange Direct Dyes are classified into direct azo dyes which are soluble in water and directly attach itself to cellulose fibers. They are favored in the creation of a consistent depth and reproducibility of uniform orange to reddish-orange hues with a consistent depth and reproducibility between the different dyeing batches.
Water-soluble dyes, Orange Direct Dyes, are commonly used in dyeing cellulosic fibers, like cotton, rayon, viscose, linen and paper. These dyes are characterized by their vivid orange colors, good fiber affinity and simple procedure of application that does not involve mordants. Being a reputable manufacturer and supplier of Orange Direct Dyes, we serve the needs of textile mills, dyeing houses, paper manufacturers, and exporters in domestic and international markets delivering products on time and of constant quality.
Technical Specifications & Best Practices
- Light Fastness: Ranges from 4 to 6 (ISO Standard), with Direct Orange 39 being the top performer for outdoor fabrics.
- Dyeing Temperature: Optimal exhaustion occurs between 80°C and 95°C.
- Salt Requirement: Use $NaCl$ or $Na_{2}SO_{4}$ to promote dye uptake on cellulosic fibers.
- Fixing: For textiles, an after-treatment with a cationic fixing agent is recommended to maximize wash fastness.
Benefits of Using Orange Direct Dyes
- Simple Dyeing Process: No mordant required
- High Productivity: Faster dye uptake and reduced processing time
- Consistent Shade Quality: Excellent batch-to-batch reproducibility
- Economical Solution: Suitable for large-scale production
| Popular Direct Orange Dye Variants | |||
|---|---|---|---|
| Product Name | C.I. Number | Primary Applications | Key Benefit |
| Direct Orange 26 | 29150 | Cotton, Silk, Paper | Highly soluble; provides a bright, reddish-orange tone. |
| Direct Orange 34 | 40215 | Paper Pulp, Leather | Excellent affinity for wood fibers; very cost-effective. |
| Direct Orange 39 | 40215 | High-end Textiles, Upholstery | Superior light fastness; resistant to UV fading. |
| Direct Orange 102 | 29156 | Viscose, Rayon, Blends | Strong wash fastness when used with fixing agents. |
Frequently Asked Questions
What materials can be dyed with them?
They are most compatible with and have a high affinity for cellulosic fibers (such as cotton, viscose rayon, and jute), as well as silk, wool, polyamide fibers (nylon), paper, and leather. They are generally not effective on synthetic fibers like polyester or acrylic.
Do orange direct dyes fade easily?
They are known for their brightness but typically have moderate lightfastness and poor to moderate wash fastness compared to other dye classes. They can be prone to color bleeding if not properly after-treated.
What are the key advantages of using them?
Key benefits include their excellent solubility in water, ease of application (no complex processes or mordants required), strong color intensity, and cost-effectiveness.
How do I dispose of leftover dye?
Disposal should always follow local environmental regulations. Never pour dyes down the drain.
How can I improve the wash fastness?
Using specific after-treatment fixing agents or resin finishing can significantly improve the wash and rub fastness of the dyed material.