Sulphur Black Dyeing
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Project, Trade Technology Information - Contents on CD ROM

Information profile @ a Glance
  • Sulfur dyes are synthetic organic substantive dyes for cellulosics ; sulfur black is one
  • These are water insoluble dyes and have no affinity for the celluloses
  • Sulfur dyes are water insoluble compounds that have to be converted during the dyeing process first into a water-soluble form and then to a reduced form to enable fixing of the dye on the fiber to be dyed
  • Converting the original dye into water solubility is by treatment with an aqueous solution of highly polluting sodium sulfide. This causes an increase in the sulfide content of the mill's effluent. On account of its toxicity the State Pollution Control Board prescribes a limit of 2ppm for sulfide in the treated effluent. Complying with these standards was one of the major problems
  • After dyeing the fabric, the dye is converted back to insoluble form with acidified dichromates to prevent washing out of the dye from fabric; dichromates are toxic too
  • Regulations are in place to enforce pollution control in almost all the countries including India
  • Chemical Substitution of these chemicals has been done and clean production was achieved and pollution control reached


Basic Information

  • About Sulphur Black

  • Sulfur Black specification

  • Dyes and Fibres

  • Textile Chemistry & Dyeing

  • Environmental Legislation

  • Sulfur dyeing

Case Studies

  • Company - Mumbai

  • Companies - Egypt

  • Double Black Dyeing

  • The Western Dye Industry

  • Sulphur Black Dyeing

Technology Information
  • Sulfur Dyeing
  • Non-Sulfide Reducing agents
  • Ecological Sulphur Dyeing
  • Sulphur dye concentration control
  • New sustainable range of dyestuffs for textile and paper dyeing
  • Dye Removal from Wastewater Using Iron Salts
  • Ozonation of textile effluents and dye solutions

Environment Protection

  • The problem & Solution
  • Cleaner Production Assessments
  • Alternate production for Pollution Reduction
  • Reduction of sulfide in effluent from sulfur black dyeing
  • Biological Treatment of Textile Effluent in Stirred Tank Bioreactor
  • Textile Industry Chronicle
  • Chinese Material
  • The dyeing process and how we can improve environmental impacts
  • Oxidative treatment
  • Zero Discharge

Project Information

  • Technical Consultants
  • Reducing water and chemical use
  • Consultant - technical
  • Dyeing Equipments supplier
  • Laboratory Services
  • Project Contacts & Links
  • Dye Manufacturer
  • Dyeing Machinery for Denim

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Primary Information Services
 21 Murugappan St, SwamyNagar Ext2, 
Ullagaram, Chennai - 600091, India.
Phone: 91 044 22421080   FAX : 91 44 22423753
Email :
Mobile numbers: 9940043898, 9444008898