One of the earliest pigments known to man

and they were still mixing the artist's highly pigmented colours in the shop

also known as Indanthrone

and produced by Canson at his request in the early 20th century

golden heavy body fluorescent blue Size:118ml One of the earliest pigmentsFluorescent Acrylic Colors are intense, brilliant colours, produced from dyes surrounded by a polymer coating. Because fluorescent colours are transparent, greater intensity is achieved by applying them over bright white surfaces. Fluorescent Colors are not lightfast. For permanence, a topcoat of GOLDEN MSA Varnish with UVLS (UltraViolet Light Stabilizers) is recommended, although varnish and top coats will eliminate the fluorescent "glow" under black