Dyeing
Trisperse Dyes are
sprinkled into lukewarm water and stirred and allowed to stand for a few
minutes. The Dispersion is addes to dyebath after steving.
Trisperse Dyes can be applied
to Polyester by Carried dyeing at boil, high temperature dyeing at
130-C or by pad-dry-thermosol method.
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High Temperature./
High Pressure Dyeing
The dyebath is set with dyestuff.
I gms/ liters Dispersing agent and levelling agent is
necessary. The pH is adjusted with Acetic acid to between 4.5-5
.
The Temperature is rased from 60-C
to 130-C in one hour and dyeing is continued for further 45-60
minutes. The bath is cooled to 80-C and drained or if facilities permit
the bath should be drained at the highest temperature to prevent oligomer
redeposition
The goods are then reduction cleared.
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