Leuco-Indigo (Soluble Indigo / Indigo White)
Leuco-indigo, also known as indigo white, is the reduced, soluble form of indigo obtained by treating indigo with a reducing agent such as sodium hydrosulfite in an alkaline vat. It is the actual dyeing species in traditional and modern indigo vat dyeing of denim, knit fabrics, and yarn, oxidizing back to insoluble blue indigo within the fiber upon air exposure. Chemzip supplies stabilized leuco-indigo preparations for continuous denim dyeing operations.
Технические характеристики
| appearance | Yellow-green liquid or paste |
| pH (1% solution) | 10.5–12.0 |
| indigo content (%) | ≥20.0 |
| reducing agent residual (g/L) | ≤2.0 |
Области применения
- Continuous and rope denim indigo vat dyeing
- Yarn and knit fabric indigo dyeing
- Pre-reduced indigo for electrochemical dyeing systems
- Indigo concentration monitoring in dye house QC
- Historical textile restoration and conservation
Особенности продукта
- Pre-reduced formulation reduces dye house chemical consumption and wastewater
- Stable leuco form maintained under nitrogen blanket during shipping
- Direct dosing into continuous dyeing ranges without on-site reduction
- Supports electrochemical vat dyeing systems for sustainable denim production
