CATIONIC DYE RETARDER |
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AVCO-RETARDER CAT is a levelling agent with affinity to acrylic fibres, which in the beginning of the dyeing process goes on to fibre dyeing sites faster than the dyestuff molecule, herewith lessening the absorption rate of the dyestuffs. It slows down the rate of exhaustion of the cationic dyes in the critical range of the heating phase (above 80°C). Due to this retarding effect it promotes the even uptake of the dyes.
SPECIFICATION:
PROPERTIES & USES:
APPLICATION: As a general rule the amount of retarder employed in the dyeing, will depend on the exhaust rate of each dyestuff, saturation factor of the acrylic fibre to be dyed and depth of shade required.
The following concentrations of AVCO-RETARDER CAT are recommended:
To receive exact concentration of AVCO-RETARDER CAT in the dye-bath use the following formula:
SF – C1 · SBF1 + C2 · SBF2 + C3 · SBF3 = % AVCO – RETARDER CAT
0.7 SF – saturation factor of the acrylic fibre
C 1, 2, 3 – quantities of application of dyestuffs SBF 1,2,3 – saturation factors of each dyestuff This formula is only an indication, and initial laboratory trial should be made before big scale dyeing.
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