Grumbacher Academy Watercolor - Gamboge Hue, 7.5 ml tube
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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 when used as intended. See [Health and Safety ](https://www.dickblick.com/learning-resources/product-info/health-safety/ "Learning-resources/product-info/health-safety")for further information.
Product Details
- Color:
- Gamboge Hue
- Size:
- 7.5 ml
- No.
- 077
- Mfg #:
- A077
Colors on Monitors -
Due to differences in users’ monitors, the colors presented are an approximation of the true color.
Reviews
Pigment Information
This color contains the following pigments:
PO62-Benzimidazolone Orange
PY138-Quinophthalone Yellow
PY65-Hansa Yellow
Pigment Name
PO62-Benzimidazolone Orange
Pigment Type
organic, monoazo
Chemical Formula
C17H13ClN6O5
Properties
Benzimidazolone Orange is a staining, yellowish orange pigment that can become dull in tints. It has an average drying time, and it loses some of its intensity as it dries. The yellowish orange varieties are more transparent.
Permanence
Benzimidazolone Orange has excellent lightfastness and outstanding heat and solvent stability for a monoazo pigment.
Toxicity
Benzimidazolone Orange is not considered toxic.
History
The benzimidazolone group of pigments was developed and patented in 1960 by Hoechst A.G., a German chemical manufacturer that was a forerunner of the pharmaceutical company Aventis. Use of benzimidazolone pigments in the auto industry, especially Benzimidazolone Orange, became common in the 1980s because they were common replacements for lead chromate pigments, which were phased out during this period.
Pigment Name
PY138-Quinophthalone Yellow
Pigment Type
organic synthetic, quinoline, vat
Properties
Quinophthalone Yellow is a transparent pigment classified as a vat pigment. It has high tinting strength and an average drying time.
Permanence
Quinophthalone Yellow has excellent lightfastness.
Toxicity
Quinophthalone Yellow is not considered toxic.
History
Unknown.
Pigment Name
PY65-Hansa Yellow
Pigment Type
monoazo
Chemical Formula
C18H18N4O6
Properties
This Hansa Yellow ranges from reddish yellow to greenish yellow with temperature shifts from cool to warm hues. It has good tinting strength and average to slow drying time.
Permanence
This Hansa Yellow has excellent lightfastness, particularly in the 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.
Safety Data Sheet
UPC Code: 014173350688
ASIN #: B000G2H70I