Some facts of hot and cold mercerisation:
Hot mercerization: Hot caustic lye at
about 60oC penetrate better and more evenly to the yarn core of the
fabrics. Swelling is better as compared to cold mercerization which helps to
improve the dimensional stability of fabric. Hot mercerization ensure even dye
penetration and imparts a softer handle and better appearance. Shorter
impregnation time requirement reduce investment cost. For hot mercerizing, the
impregnating section is equipped with an indirect steam heating system with
temperature controlled to maintain uniform temperature.
Cold mercerization:In the cold
mercerizing the cold impregnating process impart more lusture to the fibre than
the hot impregnation system mainly due to the greater shrinkage and high
tension needed the re-stretch the fabric to the desired width.
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