Dispersion coloring
In dispersion dyeing , synthetic dyes that are sparingly soluble or practically insoluble in water are used. Since the coloring is also done from an aqueous solution, the coloring agents are finely ground and put together with dispersing agents in a dye bath heated to approx. 100 ° C. The molecularly distributed dye particles in it are drawn out of the liquor and then diffuse into the fiber, where they loosen and form a firm bond. This process is only used with synthetic fibers such as polyester , often with very fine-fiber sportswear . This achieves the required, particularly lightfast and washable colors. Azo, anthraquinone and naphthol dyes are used as chromophores. In addition, the disperse dyes are used in the transfer printing process to print polyester fabrics.
See also
literature
- Norbert Welsch and Claus Chr. Liebmann: colors, nature, technology, art . 3. Edition. Spectrum Academic Publishing House, Heidelberg 2012, ISBN 978-3-8274-2846-2 (EA Heidelberg 2003)