What is Pigment

Pigments are very fine powder that have their own color, and they are color material for paint. Paints are mainly made of pigments and binders. Pigments must not dissolve into binders which can be dissolve into medium are not pigment but "Dye". For example , in case of oil paint , pigments disperses as powder in paints and stays in their films on the canvas.

Some of the striking features of pigments are given here:

A good baking stability that makes them suitable for automotive and other industrial paints
High tinting strength
Excellent light and weather fastness
Excellent solvent resistance properties
Easily dispersible
Consistency and uniqueness of shades
Good over spray fastness when applied in paints
Gives heat stability of around 300° C in the case of Polyolefins Plastics

Pigments are chosen according to their applications, while choosing them, following broad factors can be taken as a guide:

Color
pH value
Bulking
Density
Hiding efficiency
Hardness
Oil absorption
Refractive index

Comparison among various classes of Pigments
The table given below describes the comparison of Pigment families:

Property Behavior	Inorganic Pigments	Classical Organic Pigments	Specialty Organic Pigments	Organic Dyestuffs
Opacity	Usually high	Translucent to Transport		Very Transparent
color Strength	Low to moderate	Considerably stronger than Inorganic Pigments		Strongest
Dispersability	Usually Good: Often Abrasive	Adequate	Poor to good	Not required; Soluble
Heat Resistant	Usually 500⁰ F; Some 200⁰ C	150⁰ C-300⁰ C	200⁰ C- 300⁰ C	250⁰ C- 350⁰ C
Migration resistance	Excellent	Moderate -Good	Good - Outstanding	Very Poor - good
Light Fastness (on a Blue scale	6 to 8	2 to 6	6 to 8	2 to 7
Weather resistance	Outstanding for selection	Insufficient	Excellent for Selection	Good for selection

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Features of the Pigments

Factors that go in selecting the right Pigment