RR Series

COTFIX RR Series is a three-shade reactive-dye range for very light and medium shades, rather than the deep-shade focus of D. Nuchem's table lists Yellow RR, Red RR and Blue RR with solubility of 100 g/L at 30°C. Their dischargeability differs: Yellow is partially dischargeable, Red is not dischargeable and Blue is dischargeable. Light, rubbing and washing performance must also be read for the individual shade.

Approval and conformance coverage varies by product and strength variant. Check product-specific evidence and request documents for your exact COTFIX grade; a series name is not a whole-range approval.

Which shades and fastness values does the RR Series publish?

COTFIX RR Series is a three-shade reactive-dye range selected and chemically modified for very light and medium shades, rather than the deep-shade territory of D Series. The published table lists Yellow RR, Red RR and Blue RR, each at 100 g/L solubility at 30°C. Dischargeability differs across the three: Yellow RR is partially dischargeable, Red RR is not dischargeable and Blue RR is dischargeable. Rubbing, light and washing ratings are read on the individual row rather than as a single range figure. Nuchem checked 34 published ZDHC Gateway products on 28 September 2026, according to Control Union Level 3 records. Confirm the exact grade before applying any range-level figure to a light or medium shade.

D — Dischargeable · PD — Partially dischargeable · ND — Not dischargeable. Understand the table terms.

What makes the RR Series suitable for very light and medium shades?

For deep shades, compare the D versus RR selection guidance, where all four D entries are marked dischargeable. Nuchem positions the RR Series for pale and mid-depth work, where shade consistency on a light tone matters more than the deep-shade strength of the D range. Share the substrate, target shade and required fastness so the individual RR grade can be assessed against a real production process rather than a shade name alone. Reading the light and washing rating on the specific row keeps a pale-shade decision grounded in the published values.

How does Nuchem hold lot-to-lot consistency for the RR Series?

Fastness data is useful only when the same result can be repeated on the next lot. Nuchem describes a three-point quality check, laboratory support and production-lot records for the COTFIX RR Series. The check runs before delivery, so a pale or mid-depth shade can be traced back to the source batch. A buyer can ask for the test record matching a chosen RR grade rather than a blanket range statement.

What does Nuchem publish about wastewater treatment?

Nuchem's published wastewater-treatment description covers reverse osmosis, Mechanical Vapour Recompression (MVR) and an Agitated Thin Film Dryer (ATFD). At the Sayakha plant in Bharuch the operation runs at 100% zero liquid discharge, so no liquid process effluent leaves the site. The MVR and ATFD train is rated at 53 kilolitres per day (KLD). Condensate is recycled back into the manufacturing process, and dried sludge goes to Gujarat Pollution Control Board (GPCB) approved Treatment, Storage and Disposal Facility (TSDF) sites.

The Sayakha status and the 53 KLD figure should not be read across to the Vatva plant in Ahmedabad without confirmation. For an RR Series supply-chain file, keep the site description apart from the approval and conformance documents for the exact chemical grade; product conformance does not certify a factory's water-treatment performance. Read the full water-treatment explanation.

Need a sample or a shade match?

Share the shade, substrate and process to discuss grade selection, sample availability and product-specific documents.