In Organic pigments, the molecules are made of carbon atoms along with hydrogen, nitrogen or oxygen atoms. Organic pigments can be subdivided into two subgroups:
Organic Pigments- Pigments of this category are derived from animal
products and plant products. The use of these pigments are rare due to
their poor lightfastness property.
Before the beginning of the modern era, the natural organic pigments
were considered as an important part of the historical pigments. Earlier
these are used for bodily ornaments, textile dyeing and cosmetics.
But, today a large number of the natural organic dyes have been
replaced by the synthetic organic dyes. Therefore, today, these pigments
are remembered by theirs quaint historical names. These pigments are
being adopted by the modern commercial paint companies to lend romance
in their traditional mixtures.
Organic Pigments- Pigments of this category are carbon based and
these are often made from petroleum compounds. Most of the Synthetic
Organic Pigments except Carbon Black are not stable and they will wear
away at the time of using as a pigment.
Under intense pressure or heat, carbon base molecules are manufactured
from petroleum, acids, and other chemicals and Synthetic Organic
Pigments have been formulated from these molecules.
These two subgroups of Organic Pigments have been depicted in the