Why It Matters
Wash, rub and light fastness fail because dye is under-fixed or unfixed dye remains on the surface
Solution Approach
Wash, rub and light fastness fail because dye is under-fixed or unfixed dye remains on the surface RawSource supplies the base chemicals that go into these programs. We can help with product selection, grade matching, and sourcing from multiple origins for supply security.
Typical Processing Workflow
1
Substrate & Process Assessment
Identify the fiber and process stage (pretreatment, dyeing, finishing) and the performance, hand, and compliance targets.
2
Auxiliary Selection
Match surfactants, wetting and dispersing agents, softeners, fixatives, or pH and sequestering agents to the substrate and bath chemistry.
3
Lab Dip & Dosing
Confirm dose and sequence on a lab dip or pad trial, checking levelness, fastness, hand, and bath stability.
4
Production Validation
Verify reproducibility, fastness, and effluent compliance at scale, and set the recipe and packaging for production.
Recommended Chemistries (3)
Sodium Carbonate (Soda Ash)
CAS 497-19-8
Acids & Salts
Alkali buffer for reactive dyeing and scouring
alkali driving covalent dye-fiber bond formation, the basis of reactive wash fastness
Melting Point: 856 °C Boiling Point: Decomposes on heating by CO2 loss Density: 2.54 g/cu cm
Full Details
Sodium Lauryl Sulfate (SLS)
CAS 151-21-3
Surfactants
Wetting agent for pretreatment
anionic soaping detergent that washes off unfixed/hydrolyzed surface dye after fixation, the step that lifts wash and rub fastness
Melting Point: 204–207 °C Density: > 1.1 at 20 °C Solubility: < 1 mg/mL at 19 °C
Full Details
Acetic Acid
CAS 64-19-7
Acids & Salts
pH adjustment for enzyme activity
2789 (ACETIC ACID, GLACIAL) · Class neutralizes residual alkali to stabilize the final shade
Melting Point: 17 °C Boiling Point: 118 °C at 760 mmHg Density: 1.051 at 20 °C
Full Details
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