Question

1. A dye is required to improve the fastness.
(a) pigment (b) mordant (c) modifiers
(d) auxochrome​

Answer 1

Answer:

pigment

Explanation:

option (a) is the correct answer

Answer 2

Option (c) - A Modifier in the dye is required to improve the fastness of colour.

Explanation:

• Dye is an organic, inorganic substance which is made from plants or chemicals it may occur naturally in the environment or prepared artificially.
• When mixed into a liquid it can be used to change the colour of something such as cloth or hair.
• The fastness of the colour is followed by the exposure to the light of the material.

• It may be defined as the level of change in colour it undergoes when exposed to the light source.
• The Modifier is a compound that is added after the dyeing of the colour of the cloth

• The Fastness of colour is the resistance of a material in order to show the change in colour characteristics.
• It helps to transfer its colourant to adjacent materials.