Blacks
Reactive Black 5 familyBuilt on Reactive Black 5 (COTFIX Black B) and branded into different blacks by tone and depth. Black B is the primary vinyl sulphone black with good compatibility and dischargeability; Black WNN produces a neutral-toning black. Six blacks in total, because black is never one colour in practice.
Shades and fastness data
6 shades, with solubility, rubbing, light and washing fastness measured on standard grey scales.
| Dye | Shade 2% | Solubility gpl 30°C | Rubbing Fastness (Dry) | Rubbing Fastness (Wet) | Light Fastness 1/1 S/D | Washing Fastness (Shade) | Washing Fastness (Cotton) | Dischargeability |
|---|---|---|---|---|---|---|---|---|
| Cotfix Black WNN | 100 | 4 | 4 | 4 | 4 | 3-4 | D | |
| Cotfix Black 2R | 100 | 4 | 3-4 | 4 | 4 | 3-4 | D | |
| Cotfix Black 2N | 100 | 4 | 3-4 | 4 | 4 | 3-4 | D | |
| Cotfix Black WNN H/C | 100 | 4 | 3-4 | 4 | 4 | 3-4 | D | |
| Cotfix Super Black G | 100 | 4 | 3-4 | 4 | 4 | 3-4 | PD | |
| Cotfix Super Black R | 100 | 4 | 3-4 | 4 | 4 | 3-4 | PD |
D — Dischargeable · PD — Partially dischargeable · ND — Not dischargeable. Ratings on standard grey scales.
Characteristics
Built on Reactive Black 5 (COTFIX Black B) — branded into different blacks under different tones and depths to match market requirements. Black B is the primary vinyl sulphone black with good compatibility and dischargeability; Black WNN produces neutral-toning black; Black PN is a monochlorotriazine dyestuff suited for printing due to high alkali stability.
Blacks carry the widest dischargeable selection in the range. Manufactured at Unit 1, Sayakha (Bharuch) and Unit 2, Vatva (Ahmedabad), with in-house laboratories at both sites. Every lot is tested before dispatch and every shade is traceable, which is what makes the figures above dependable rather than indicative.
How consistency is held, lot after lot
Fastness figures are only worth as much as the reproducibility behind them. Three controls sit behind every drum dispatched.
Every dye manufactured undergoes a rigorous three-point quality check system before delivery.
QC labs at the Ahmedabad head office, Ludhiana regional office, and both the Sayakha and Vatva factories.
A comprehensive database of all production lots ensures traceability and consistent delivery, lot after lot.
Made under Zero Liquid Discharge
Advanced wastewater treatment achieves Zero Liquid Discharge — no liquid waste is released into the environment. Mechanical Vapour Recompression and an Agitated Thin Film Dryer give 53 KLPD of water evaporation capacity, with a two-stage reverse osmosis plant recovering water ahead of evaporation.
That matters commercially as well as environmentally. Brands auditing their supply chain increasingly ask what happens to the effluent, and ZLD is the answer that closes the question before it becomes a purchasing obstacle.
Need a sample or a shade match?
Send the shade, substrate and process and we will dispatch a lab sample.
Request a sample RR Series — light & medium