Cadmium orange is a modern pigment which was not used very often in oil paintings. Its composition is similar to cadmium yellow and cadmium red.
Pigments - ColourLex
Pigments - ColourLex - Art and Science
Cadmium pigments - Wikipedia
Cadmium red - ColourLex
Sulphur - ColourLex - Art and Science
Cadmium orange - ColourLex
Dalnavert, in Yellow — Dalnavert Museum
cadmium orange Archives - ColourLex - Art and Science
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Orange Pigments - ColourLex
Usage of heavy metal-free compounds in surface coatings
Week 1: Explore Yellow and Pigment Origins
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yellow - ColourLex - Art and Science
orange - ColourLex - Art and Science