Question

Give any three characteristics of dyes?

Answer 1

Hint: We know that a dye is a coloured substance that chemically bonds to the substrate to which it is being applied. So, we have to write three characteristics.

Complete step by step solution:
Here we see different classes, characteristics or types of dyes. There are various classes and types of dyes which are listed below:

Like: 1) Acid Dyes, 2) Natural Dyes, 3) Basic (Cationic) Dyes, 4) Synthetic Dyes, 5) Direct (substantive) Dyes, 6) Disperse Dyes, 7) Sulfur Dyes and, 8) Pigment Dyes etc.

Here we see some major characteristics of dyes:
Dyes are intense in color.
Solubility in water at some point during the dyeing cycle. Dyes are usually soluble in water. Some dyes can be rendered insoluble with the addition of salt to produce a lake pigment.
Some substantivity for the fiber being dyed. In a dyeing process there is the interaction between a dye and a fibre, as well as the movement of dye into the internal part of the fibre. And a dyeing process involves adsorption (transfer of dyes from the aqueous solution onto the fibre surface) and diffusion (dyes diffused into the fibre).
Reasonable fastness properties of the dyeing produced.

Note: Dyes and pigments both are colored, because they absorb only some wavelengths of visible light. Usually dyes are soluble in water, whereas pigments are insoluble. On nylons and wool acid-based dyes are used mostly.