Can sulfur dyes still be used?
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I have a few questions for experts in the dye industry. 1. Are sulfonic dyes still used in new productions nowadays? 2. What are the new technologies and processes available for technological upgrades? 3. Are there any new products or new manufacturing processes in the overall production? 4. If it is launched anew, can any appropriate ways be thought of to obtain policy support? I’m in a hurry; please help, experts! Thank you!
Many companies are gradually switching to the production of direct dyes