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Frequently Asked Questions:

Q: How to avoid batch to batch shade variation in reactive dyeing?

Q: How do you dye a solid shade on cotton viscose blended material? Both have different dye affinity.

Q: Does soaping really improve the Washing and Rubbing fastness properties of reactive dyed material?

Q: Increase in depth of Cotton dyed goods without increasing the dyestuff concentration - Is it possible?

Q: What are some important points for achieving level dyeing in jet dyeing with reactive dyes?

Q: What is the best method to strip a reactive dyed material in cheese form?

Q: What is APEO and what does APEO free surfactants mean? How to remove the APEO content of a finished fabric?

Q: Is there any possibility of improving the light fastness of reactive dyed fabric by any treatment?

Q: In Viscose-Lycra blended knit fabrics, after compaction and relaxation of one or two days, elongation occurs across the length of the fabric. Why does this happen and how can it be prevented?

Q: In heavy-knit structures and flat-back rib structures like collars (especially mercerised collars), crease marks can be noticed even after the addition of lubricants. This causes the formation of dark lines on collars. How can this be prevented?

Q: In mercerised fabrics, if patches are seen after dyeing, how can the root cause be identified whether it is defective mercerisation or defective dyeing?

Q: What is 'phenolic yellowing' and how is it influenced by acidic and alkaline conditions?

Q: After drying, a reactive bright lemon yellow turns in to redder and duller, Turquoise becomes yellowier, Royal blue becomes greener and bright reds become duller and bluer - what is the reason and how to prevent this?

Q: What are the uses of Sodium Alginate, especially in Textile Industry?

Q: Water Marks in the dyed fabric? How to get rid off after dyeing / before dyeing? (100% cotton)

Q: How to remove mildew from fabrics?

Q: What is the right procedure for dyeing cotton fabric/yarn in to a Turquoise Blue Shade? I faced with too much of bleeding even after cationic fixing ! (15-03-2009)

Q: Is it possible to dye Turquoise Blue Shades at lower temperatures? (24-03-2009).

Q: What are right practices of Continuous and Semi Continuous process of woven cotton fabric, from preparation to reactive dyeing? What are reasons for the following problems and how they can be taken care of? Problems: 1. Tailing, 2. C/S variation (Center to selvedge), 3. Back to Face variation, 4. Lot to Lot variation, 5. Specks and spots in dyeing.

Q: Please suggest a dying method to avoid speckyness/leveling problems in conc. dyes. Such as Blue SE2RI/Blue SR/N. Blue EXP.

Q: What are Iso-thermal and Thermo-migration method of reactive dyeing?

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