Old Holland New Masters Classic Acrylics - Gold Ochre, 250 ml jar

Pigment Information

This color contains the following pigments:

PY42-Mars Orange

PO61-Isoindoline Orange 61

Pigment Name

PY42-Mars Orange

Pigment Type

inorganic, earth

Chemical Name

iron oxide

Chemical Formula

Fe2O2 or Fe2O3 • H2O

Properties

Mars Orange is a bright, extremely light red and appears almost pinkish in contrast with darker colors. It has incredible tinting strength and opacity. The synthetic form of Mars Orange is made from iron oxides and is cleaner, brighter, and denser than its ochre-based counterparts.

Permanence

Mars Orange has excellent permanence and lightfastness.

Toxicity

Mars Orange has no significant hazards.

History

The word Mars refers to the Roman god of iron and war. Mars Orange has been manufactured as a pigment since the 17th century.

Pigment Name

PO61-Isoindoline Orange 61

Pigment Type

organic, azomethine

Chemical Name

isoindoline orange

Chemical Formula

Properties

Isoindoline Orange 61 is an opaque, yellowish orange pigment with moderate tinting strength.

Permanence

Isoindoline Orange 61 has very good lightfastness, although not as good as yellow pigments in the isoindoline group.

Toxicity

Isoindoline Orange 61 is not considered toxic.

History

The first isoindoline pigments were patented in 1946, and commercial production of pigments in this group began in the 1960s. Because of its high heat stability and relatively good lightfastness, PO61 is used in plastics, automotive finishes, and for printing inks. PO61 is often compared with PO13, which has higher tinting strength, but is not as lightfast.