Beitrag zur Verwendungsgeschichte der Kupfer-Phthalocyaninpigmente Heliogenblau und Heliogengrün in Künstlerfarben

On the History of Using Copper Phthalocyanines Heliogen Blue and Heliogen Green in Artists’ Colours Copper-Phthalocyanines are a synthetic organic group of pigments whose first representatives were introduced to the German market in 1936 respectively in 1938 under the trade names Heliogen Blue B and Heliogen Green G. Considering the pigment historical context, it becomes obvious that they had to liberate themselves first from the prejudices against the non-light-resistant tar dyes still made into artists’ colours in the early 20th century. The author aims at demarcating their earliest use in artists’ colours respectively as artists’ pigments from different perspectives. Therefore research was conducted in contemporary art and painting technological literary sources as well as with regard to the production of colours. References are found in the Colour Index International in particular and in a survey among German manufacturers of artists’ colours. These data are complemented by an insight into the state of research of the earliest available analyses from samples of paintings. The results show that copper phthalocyanine pigments were used as artists’ pigments already shortly after their introduction to the market.