DYEING PROCEDURE

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(iii) All-in Method

This method is particularly suitable for unmercerised cotton produce deep shades. Moreover this method is applicable to vinylsulfone dyes and hence combination of vinylsulfone dyes is possible.

Process, set the dye-bath at 20⁰ to 30⁰C. Add salt and continue dyeing for 5 to 10Min. Then dye solution and continue for 15 to 20Min. Now add half amount of alkali and dye for 5 to 10Min. Add remaining 1/2 amount of alkali and continue for further 5 to 10Min. Then raise temperature to 50⁰ to 60⁰C in 20Min. (1.5⁰C rise/minute) and continue dyeing at 50⁰ to 60⁰C for 45 to 60Min.

"New all-in" Method


The "new all-in" method with Bi-functional dyes gives an ideal rate of dyeing in terms of levelness and reproducibility even after the addition of alkali, but it is necessary to take into account the type of dyeing machines and the form of materials to be dyed.

Suitability for cheese dyeing

The suitability for cheese dyeing was measured as follows:

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