Emerald Green pigment This deadly green pigment contains copper and arsenic. Discovered in 1775 and named after its inventor, the Swedish chemist Carl Wilhelm Scheele, Scheele’s green is copper hydrogen arsenite, with the approximate chemical composition CuHAsO₃. It is an opaque yellow-green pigment developed in an attempt to replace the historic copper-based greens of verdigris…
Pyrrole Red pigment Pyrrole Red is a synthetic organic pigment belonging to the diketo-pyrrolo-pyrrole (DPP) family, developed in the late 20th century to provide an opaque, non-toxic, highly durable alternative to traditional inorganic reds such as cadmium, cinnabar, and red lead. Its molecular structure, a conjugated heterocyclic system, produces a vivid, pure red with exceptional…
Pyrrole Orange pigment Pyrrole Orange is a modern organic pigment engineered for stability and chroma. Belonging to the diketo-pyrrolo-pyrrole (DPP) family of pigments, pyrrole orange is a synthetic organic compound developed in the late 20th century for industrial coatings before being adopted by artists’ colourmen. Its chemistry is based on a highly conjugated heterocyclic structure…
Phthalocyanine pigments Phthalocyanine pigments are a class of modern synthetic organic pigments prized for their exceptional chroma, chemical stability, and versatility. Developed in the 20th century, they transformed artists’ palettes, providing vivid blues and greens with unparalleled lightfastness and consistency compared to historic inorganic and organic pigments. Chemical Basis Phthalocyanine pigments are macrocyclic, planar molecules…
