HomePaintWatercolor Paint and GouacheGrumbacher Academy Artists' WatercolorsGrumbacher Academy Artists' Watercolor - Geranium Lake, 7.5 ml tube

Grumbacher Academy Artists' Watercolor - Geranium Lake, 7.5 ml tube

Item #:00330-3710
View Product Details
click image to zoom in
Geranium Lake
Geranium Lake

Save For Later

  • My Wishlist(s)
AP Non-Toxic.

Products bearing the AP seal of the Art & Creative Materials Institute, Inc. (ACMI) are certified non-toxic. A product can be certified non-toxic only if it contains no materials in sufficient quantities to be toxic or injurious to humans, or to cause acute or chronic health problems.

Product Details

Color:
Geranium Lake
Mfg #:
A078
No.
078
Size:
7.5 ml

Pigment Information

This color contains the following pigments:

PR170-Naphthol Red

PR149-Perylene Red

PR166-Cromophtal Scarlet


Pigment Name

PR170-Naphthol Red

Pigment Type

organic, naphthol AS

Chemical Formula

C26H22N4O4

Properties

Pigment PR170 is a bright deep red with bluish undertones. It has an average drying time. It has two crystaline forms that differ significantly in opacity. The more transparent form (F5RK) tends to be more bluish and is less lightfast.

Permanence

The lightfastness and weatherfastness of Pigment PR170 varies, depending on the application and the crystaline form. The opaque form (F3RK) has very good lightfastness, and is more weather resistant. The transparent form (F5RK) has lightfastness that is considered acceptable in pure applications, but it fades more in tints. Neither form is considered suitable for exterior use.

Toxicity

Naphthol Reds are not considered toxic. They may cause eye, skin, or respiratory irritation. Contact with dry pigment should be avoided.

History

Naphthol pigments are actually dyes that are "laked" to form pigments. First developed by the German chemical company Hoechst A.G. before World War I, their use in artist paints began in the 1920s. Pigment Red PR170 is a Naphthol AS pigment, chemically related to the diarylide yellow pigments. The Naphthol AS pigments comprise a range of reds. They are used in plastics, textiles, and printing inks.


Pigment Name

PR149-Perylene Red

Pigment Type

organic, anthraquinone

Chemical Formula

C40H26N2O6

Properties

Perylene Red is a moderately intense, semi-opaque, medium red pigment, appearing somewhere between a Cadmium Red and a Cadmium Deep Red hue. It has excellent brightness and tinting strength. Its partial transparency makes it useful as a glazing color.

Permanence

Perylene Red has good lightfastness and permanence. Its tints may darken after extended exposure to sunlight. It is not considered suitable for exterior use.

Toxicity

Perylene Red has no significant acute toxicity. Its long term hazards are currently unknown.

History

Perylenes have been used as vat dyes since 1912, but they were not manufactured and sold as pigments until 1957. For artists, they are a replacement for historic colors that were made with berries, and are significantly more lightfast.


Pigment Name

PR166-Cromophtal Scarlet

Pigment Type

organic, disazo

Chemical Formula

Properties

Pigment Red 166 has a yellowish red tone. It is semi-transparent and has high tinting strength.

Permanence

Pigment Red 166 has very good lightfastness.

Toxicity

History

Pigment Red 166 is a disazo condensation pigment, and is used in paints, plastics, printing inks, packaging, textiles, and many other applications.


Safety Data Sheet

UPC Code: 014173350695

ASIN #: B000G2J5EO