Byfairmont
Pigments
Definition of Pigments
Pigments are generally coloured, organic or inorganic solid powder, and usually are insoluble. They are not affected physically or chemically in the substrate in which they are incorporated. Pigments can give a full range of colours.
Types of pigments
Inorganic Pigments: Those pigments that are made up of mineral compounds are known to be Inorganic Pigments. These minerals are mainly oxides, sulphides of one or more metals.
Organic Pigments: In organic pigments, the molecules are made of carbon atoms along with hydrogen, nitrogen or oxygen atoms. Organic pigments are carbon based and are often made from petroleum compounds
The Differences between Organic and Inorganic Pigments
|
Particulars |
Inorganic pigments |
Organic pigments |
|
Source |
Minerals | Chemically refined oil |
|
Color |
Often dull |
Bright |
| Opacity | Opaque |
Transparent |
|
Light fastness |
Very good | Vary from poor to good |
|
Dyeing/Coloring Strength |
Low |
High |
| Cost | Moderate |
Mostly too expensive |