This color contains the following pigments:
This Hansa Yellow ranges from reddish yellow to greenish yellow with temperature shifts from cool to warm hues. It has good tinting strength and average to slow drying time.
This Hansa Yellow has excellent lightfastness, particularly in the darker shades.
Hansa Yellow has no significant acute hazards, though its chronic hazards have not been well studied.
Hansa Yellows were first made in Germany just before WW1 from a series of synthetic dyestuffs called Pigment Yellow. They were intended to be a synthetic replacement for Cadmium Yellow.
azomethine nickel complex
Benzimidazolone Orange (PO65) is a semi-opaque pigment with a dull reddish-orange color.
Benzimidazolone Orange (PO65) is considered to have excellent lightfastness.
Benzimidazolone Orange (PO65) is not considered toxic.
The Benzimidazolone family of pigments were developed by the German chemical manufacturer Hoechst in the 1950s and 1960s.