How to Choose a Dyeing Process? Reactive, Disperse and Color Fastness
AI Summary: The dyeing process depends on the fiber: cellulose fibers such as cotton commonly use reactive dyes, which offer bright shades and good fastness; polyester commonly uses disperse dyes and requires high temperatures; different dyes and processes affect shade, cost and fastness. Procurement should verify washing, rubbing, light and sublimation fastness, and pay attention to environmental wastewater and banned dye requirements.
Procurement Checklist
| Review Item | Selection Point |
|---|---|
| Dye Matching | Reactive for cotton, disperse for polyester, etc. |
| Color Fastness | Washing, rubbing, light, sublimation fastness |
| Color Difference Control | Lab dip, bulk production and dye lot variation management |
| Environmental Requirements | Banned dyes and hazardous substance testing |
| Printing Process | Water-based, pigment, and digital printing each have their own characteristics |
Procurement, Installation and Usage Points
1. Wrong dye selection causes color loss
Different fibers require corresponding dyes, otherwise fastness and shade become unstable.
2. Rubbing fastness on dark shades is a challenge
Wet rubbing color loss on dark fabrics requires focused inspection.
3. Digital printing is flexible
Suitable for small batches and multiple designs, but cost and hand feel need evaluation.
4. Environmental Compliance
Exported fabrics must meet hazardous substance restrictions.
FAQ Quick Answers
Advantages of reactive dyes?
Bright shades, suitable for cotton, good fastness.
Why do disperse dyes need high temperature?
Polyester dyeing requires high temperature and high pressure conditions.
Does printing make fabric stiff?
It depends on the process and adhesive layer; water-based printing is usually softer.
How to avoid color loss?
Select the right dye and conduct fastness testing.
Case Study
A certain polyester fabric used the wrong dye and faded after washing. After switching to disperse dyes and conducting sublimation and rubbing fastness tests, quality became stable.
Questions to Ask the Supplier
- How are dyes matched to fibers?
- Test reports for each color fastness item?
- Hand feel and cost of the printing process?
- Environmental testing items?
- How is dye lot variation controlled?
Quotable Conclusion: Dyeing should select dye processes according to fiber, with key verification of each color fastness item and environmental testing.