Monday, 1 October 2007

Textile Dyeing-1

Textile Dyeing

There are three distinct categories by which color is imparted to textiles . These are:

By Dyeing
By Pigment Application
By Solution or Dope Dyeing

Of the three categories, the most widely used is dyeing.

Essentially, dyeing involves the use of highly complex organic chemical dyestuffs, which will under proper conditions, actually combine with the textile fibre molecule. Usually the fibre, yarn or fabric is immersed in a water solution of the dye, frequently under carefully regulated high temperature, untile the dye in the bath combines with the material to reproduce the desired colour.

Textile colouring by use of pigments differs from dyes in that pigments do not combine with the fibre molecules as dyes do. Pigments physically hold onto the textile material with resin binders in much the same way that paint holds to a wall.

Solution dyeing differs from the previous two categories mentioned because the coloration of the textile is part of the fibre manufacturing process of man-made fibres. In solution dyeing, appropriate coloring agents are added to the man-made fibre solution before it is extruded from the spinnerette.

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