Special Dyes

The Special Dyes from Clariant offer a series of high quality products that are flexible in application, based on innovation and developed specially to be used in highly ecological conditions. The product line Special Dyes in Clariant includes three types of product ranges:


  • Diresul® RDT liquid : Pre-reduced sulphur dyes in totally stable liquid form, with very low sodium sulfide content, and ready for immediate use. The use of biodegradable reducing agents along with the Diresul® RDT dyes, allows to ensure sulfide free final effluents and the absence of unpleasant odors during the application. The ecological features of the Diresul® RDT dyes are enhanced with special dyeing processes such as the Pad-Ox. The Diresul RDT products are suitable for all kind of denim processes, continuous and exhaust dyeings (blacks for jet/overflow and all range for other applications.

  • Optisul® T liquid: Solubilized sulphur dyes, totally sulfide free. Optisul® T are specially suitable for elegant surface dyeings intended for soft wash-down effects. These products are mainly applied in exhaust, specially on garment.

  • Clariant Indigo: Clariant offers Indigo in two different presentations: Clariant Indigo 042 pa and Clariant Indigo 94 gr. The Clariant Indigo 042 pa is an stable dispersion of Indigo, suitable for a clean and safe handling of the product while Clariant Indigo 94 gr is a high quality Indigo in granulated form.


With the Special Dyes ranges, Clariant offers a combination of quality, innovation, service and experience, within a total environment protection concept. Our Special Dyes are proved to be suitable for all ecological labelling purposes, including the GOTS standards.

Special dyes