Pigment:
Higher molecular substance which is not soluble in water, has good hiding power opacity & adhering characteristics are known as pigment.
Properties of Pigment:
- Good light fastness
- Good hiding/covering power.
- Resistance to acid, alkali & other chemicals.
- Resistance to heat & cold.
- Soluble in water.
- Interfere with other pigments.
- Can change with atmospheric condition.
Classification of Pigment:
1. Inorganic pigment:
(a) Earth color pigment
(b) Prepared pigment
2. Organic pigment:
(a) Lakes pigment.
(b) Toner pigment.