The phthalocyanines, introduced in the early 20th century, were the first class of organic colourants to be introduced directly to the market as ‘true’ pigments, without initially being developed as dyes or lakes.

They were a new class of super pigments with incredibly high performance in terms of tinting strength, lightfastness and chemical resistance and they quickly came to dominate the blue and green pigment markets in all applications.

The phthalo (pronounced ‘thalo’) pigments are immensely im- portant for artists’ due to their intensity and chromatic purity.