Quality checks.
Lot traceability.
Nuchem describes a three-point quality check for manufactured dye lots and lists QC laboratories at Ahmedabad, Ludhiana, Sayakha and Vatva. QC means quality control. Its production-lot records support traceability, while the published product tables report shade-specific solubility, rubbing, light and washing values. Ask about the relevant grade and lot; this summary does not state that every lot is tested in all four laboratories.
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.
How does Nuchem check and trace a manufactured dye lot?
Nuchem describes a three-point quality check before delivery of a manufactured reactive dye lot. Buyers should discuss the applicable checks and the product-specific test information with Nuchem, because the individual stages are not published here.
Nuchem operates QC laboratories at the Ahmedabad head office, the Ludhiana regional office, and both the Sayakha and Vatva factories in Gujarat. Four laboratories therefore support the published quality check, and a buyer can ask which laboratory handles the relevant grade and lot.
Nuchem maintains production-lot records to support traceability for each manufactured batch. The published product tables report shade-specific solubility at 30°C, dry and wet rubbing, light, washing and dischargeability values across eight series tables and 58 catalogue rows representing 57 displayed trade names. A published table value is not a lot-specific test report, approval coverage varies by grade, and the summary does not claim that every lot is tested in all four laboratories.
Inside our laboratories
Four published QC laboratory locations
What shade and fastness data has Nuchem published?
Nuchem's eight series tables contain 58 catalogue rows representing 57 distinct displayed trade names. The published tables report shade-specific solubility at 30°C alongside dry and wet rubbing, light, washing and dischargeability values, giving a buyer a like-for-like comparison across the COTFIX range. In the tables gpl means grams per litre, and light, washing and rubbing values are reported per shade rather than per whole series. The eight series are VS, ME, HE, RGB, D, RR, Blacks and H/P Printing, each with a published shade count from three RR grades up to twelve HE and H/P grades. The catalogue is not a lot-specific test report, and a published table value does not guarantee the same result under a different dyeing process or substrate. Buyers should match the exact grade and strength variant, then request the applicable test information from Nuchem before production.
Need a shade matched?
Share the substrate, process and standard you are matching to. Discuss shade matching, sample availability and the applicable documentation with Nuchem. A shade match starts from the exact COTFIX grade and strength variant, because a series name is not a whole-range approval. Buyers can compare the published solubility at 30°C and the dry and wet rubbing, light, washing and dischargeability values across the eight series tables before requesting a sample. Nuchem's technical team then reviews the intended fibre, the dyeing method and the target light source with the buyer. Request a shade match and specify the quantity, lead time and documentation your order needs, so the relevant grade and lot records can be checked in advance. Sample availability depends on the chosen grade, so confirm the required shade with Nuchem before the request is processed. The published quality-control approach lists four QC laboratories and a three-point check before delivery.