Name: HUSSAIN
Message: i am a professional dyer dyeing rayon yarn using vat dyes in a tub the problem is i am not getting eveness in my dyeing there are color variations in different hanks in the same dye-lot
also i would like to know wether fiber reactive dyes would be more
feasible for rayon yarn dyeing

The problem might be from inadequate washing before dyeing. Do you scour them before dyeing, using brightener-free detergent and sodium carbonate?

However, it might also be due to differences in the different hanks of rayon, in which some are better able to take up dye than others. I don't know what you can do about this problem, other than possibly finding a new supplier of rayon.

The process of dyeing with reactive dyes is much simpler than that of dyeing with vat dyes, but the results may be a bit less lightfast and washfast. Perhaps you should ask your dye supplier for some samples of reactive dye and test them out.

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