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