ONE THAT COMES IN A PACKAGING THAT IS INNOVATIVE, ELEGANT, HANDY AND FEELS RIGHT.

Phthalo Blues are pure and clean primary blues with superior covering power. They have a very high tinting strength and tend to overwhelm other pigments, but they make predictable mixed colours if colour strength can be controlled. Pigment PY74 is one of the most commercially essential pigments of the Hansa Yellow group, considered superior to many others in its class based on both tinting strength and lightfastness. It has high tinting strength and average to slow drying time.

COMPOSITION AND PERMANENCE

Pigment Information: PB15-Phthalo Blue; PY74-Hansa Yellow

1 PIGMENT NAME: PB15-PHTHALO BLUE

Pigment Type: Organic

Chemical Name: Copper phthalocyanine

Properties

Phthalo Blues are pure and clean primary blues with superior covering power. They have a very high tinting strength and tend to overwhelm other pigments, but they make predictable mixed colours if colour strength can be controlled. In oil form, blues are intense and slow drying. When mixed with other colours or added chlorine, Phthalo Blue quickly tends towards green. When using alone, mix with some white, as Phthalo Blue can be semi-transparent and almost black on its own. It is among the most compatible modern colours with mineral colours and is considered more reliable than Prussian Blue while sharing the same physical and colour properties. Phthalo Blue is a good colour for glazing.

Permanence

Phthalo Blues are completely lightfast and stable and are permanent for all paint uses. Due to their stability, they are currently used in inks, coatings, and many plastics and are considered a standard pigment in printing ink and the packaging industry.

Toxicity

Phthalo Blues have no significant hazards, although those made before 1982 contained some PCBs (polychlorinated biphenyls).

History

Developed by chemists using the trade name Monastral Blue, the organic blue dyestuff is now known as Phthalo Blue, was presented as a pigment in November 1935 in London. Its discovery was accidental. The dark colour was observed in a kettle where a dye was being made from a British dyestuff plant. The demand for such a pigment came from commercial printers who wanted cyan to replace Prussian Blue.

2 Pigment Name: PY74-Hansa Yellow

Pigment Type: Monoazo

Properties

Pigment PY74 is one of the most commercially essential 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 sizes are more brilliant and transparent. Pigment PY74 ranges from reddish yellow to greenish-yellow, shifting temperature from cool to warm hues. It has high tinting strength and average to slow drying time.

Permanence

This Hansa Yellow has better lightfastness than other yellow monoazo pigments, notably darker shades.

Toxicity

Hansa Yellow has no significant acute hazards, though its chronic hazards have not been well studied.

History

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.