Classification of pigments

Pigments may be classified on different bases, such as color, chemi­cal nature (inorganic or organic) and process of manufacture (syn­thetic or natural). A few of such classifications are explained below.

3.1.1.1 Classification based on color

Based on color, pigments can be classified in the following categories:

• Achromatic pigments

— White pigments: titanium dioxide, zinc oxide, antimony oxide

— Black pigments: carbon black, iron oxide black

• Chromatic pigments (colored pigments)

— Red pigments: iron oxide red, toluidine red, quinacridone red

— Orange pigments: cadmium orange, pyrazolone orange

— Yellow pigments: chrome yellow, benzimidazolone yellow

— Green pigments: chromium oxide green, phthalocyanine green

— Blue pigments: iron blue, ultramarine blue, phthalocyanine blue

— Violet pigments: cobalt violet, dioxazine violet, quinacridone violet

— Brown pigments: iron oxide brown, benzimidazolone brown

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