Daler-Rowney Aquafine Watercolors and Sets - Gamboge Hue, 8 ml, Tube

Pigment Information

This color contains the following pigments:

PY155-Bisacetoacetarylide Yellow 155

PR242-Pigment Red 242

Pigment Name

PY155-Bisacetoacetarylide Yellow 155

Pigment Type

organic, bisacetoacetarylide

Chemical Formula

Properties

Pigment Yellow PY155 is a  greenish yellow with high tinting strength and good solvent resistance. It is often used as a replacement for chromium yellow.

Permanence

Pigment Yellow PY155 has very good lightfastness, but some monoazo yellows have better weatherfastness. It may not be suitable for exterior applications. Grades with coarser particles have been reported to have much better weatherfastness.

Toxicity

History

Bisacetoacetarylide pigments are a subgroup of the disazo pigments. Although many have been described and patented, only a few are commercially available. Pigment Yellow PY155 is used in paints, plastics, printing inks, and industrial coatings.

Pigment Name

PR242-Pigment Red 242

Pigment Type

organic, disazo condensation

Chemical Formula

Properties

A bright yellowish red, often referred to as scarlet. It has average tinting strength.

Permanence

It has excellent resistance to solvents, acids, and alkali, and is heat stable up to 300°C. Disazo condensation compounds have very good lightfastness for organic pigments.

Toxicity

History

Pigment Red 242 is used to color plastics, paints, and printing inks.