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Hansa Yellow (Pigment PY74, monoazo ) is one of the most commercially important pigments of the Hansa Yellow group, considered superior to many others in its class based on both tinting strength and lightfastness. Several PY74 grades with different particle sizes are available. Grades with finer particle size are more brilliant and transparent. Pigment PY74 ranges from reddish yellow to greenish yellow, with temperature shifts from cool to warm hues. It has high tinting strength and average to slow drying time.

Historically, 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.

Diarylide Yellow (organic, disazo) is a semi-opaque, moderately staining, intense deep reddish yellow pigment with good tinting strength.

Historically, Diarylide Yellow comes from a family of azo pigments called Diarylide. These yellow hued pigments were developed around 1940 and are very important in printing inks.

• Pigments: Hansa Yellow (monoazo) PY74, Diarylide Yellow 83 (disazo) PY83
• Code ONE
• Permanence:andnbsp;** Moderately Durable Colour. This Hansa Yellow has better lightfastness that other yellow monoazo pigments, particularly in the darker shades. Diarylide Yellow 83 has very good lightfastness and permanence. However, it can fade in tints, so some artists do not consider it suitable as an artistsandrsquo; colour. Many other diarylide yellow pigments are reported to have fair to poor lightfastness, and some are completely fugitive. Diarylide Yellow 83 is reputed to be one of the most permanent of the entire group.
• Quality: Exceptional
• Price Series: A
• Toxicity: Hansa Yellow has no significant acute hazards, though its chronic hazards have not been well studied. Diarylide Yellow has no significant acute hazards, but chronic hazards have not been well studied.