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Types Of Dyes
Dyes are classified also as acidic or basic according to the medium required in the dyeing process. A vat dye, e.g., indigo, is so called from the method of its application; it is first treated chemically so that it becomes soluble and is then used for coloring materials bathed in a vat. Although some materials, e.g., silk and wool, can be colored simply by being dipped in the dye, others, including cotton, commonly require the use of a mordant that fixes the dye to the fiber.
Techniques
There are various widely acclaimed dyeing techniques for a variety of fabric, in which the dyers transfer colors, images or designs to the fabric and textile through various dyeing techniques. Tie dye & batik is famous dye. Batik is a method of dyeing fabric using removable wax on the parts of the fabric where dye is not required. Tie dye is a method of dyeing fabric after knotting or rubber banding it to produce interesting and irregular patterns.