D183 Metallic Yellow/Jaune Métallique - PY1 Hansa Yellow G (organic, monoazo), Mica PW20 (inorganic, aluminum silicate)
Hansa Yellow G, introduced in 1910, was the standard yellow for printing inks until late in the 20th century, when stronger diarylide yellows began to replace it. It is still used extensively in packaging and for air-drying paints. Mica has been used as a pigment since prehistoric times.
Pigment 1: PY1 Hansa Yellow G
Hansa Yellows were first made in Germany just before World War I from a series of synthetic dyestuffs called Pigment Yellow. Hansa Yellow G, introduced in 1910, was the first of these products to be commercialized. Hansa Yellow G was the standard yellow for printing inks until late in the 20th century, when stronger diarylide yellows began to replace it. It is still used extensively in packaging and for air-drying paints.
Pigment name: PY1 Hansa Yellow G
Pigment Type: organic, monoazo
Chemical Name: n/a
Properties: This Hansa yellow is transparent. It has excellent brightness and tinting strength, and its drying time ranges from average to slow. Hansa Yellow makes more intense tints and cleaner secondary colours than Cadmium Yellows, especially when mixed with other organic or modern colours like Phthalo Blue and Green. Because it is more transparent, it has great value as glazing colours.
Permanence: Hansa Yellow G has good permanence and lightfastness, particularly in the lighter shades.
Toxicity: Hansa Yellow pigments have no significant acute hazards, though chronic risks have not been well studied.
Alternate Names: Light Fast Yellow G, Pigment Yellow G, Arylide, Arylide Yellow, Azo Yellow, Brilliant Yellow, Monoazo Yellow, Monolite Yellow, Permanent Yellow.
Pigment 2: Mica PW20
Mica has been used as a pigment since prehistoric times.
Pigment name: PW20 Mica
Pigment Type: Inorganic
Chemical Name: Aluminum silicate
Properties: Mica is an off-white pigment with complex reflective effects. It is often used with transparent pigments to create mixed pigments with interference and pearlescent effects.
Permanence: Mica is permanent and lightfast.
Toxicity: Although it is entirely non-toxic and not bio-reactive, fine particles may be irritating: This is of concern primarily for those exposed occupationally to dry mica powder. Breathing mica particles may cause lung fibrosis and pneumoconiosis.
Alternate Names: n/a
