Vallejo Acrylic Gouache - Vermilion, 200 ml

Pigment Information

This color contains the following pigments:

PO73-Transparent Pyrrole Orange

PR179-Perylene Maroon

PR254-Pyrrole Red

Pigment Name

PO73-Transparent Pyrrole Orange

Pigment Type

organic, aminoketone

Chemical Name

dipyrrolopyrrol

Chemical Formula

Properties

Transparent Pyrrole Orange is a yellow-shade orange with optimum performance; high saturation and excellent durability, excellent bleed resistance, and intrinsic strength coupled with good opacity and moderate rheology. It is semi-opaque, less opaque than Cadmium Orange.

Permanence

Transparent Pyrrole Orange has been demonstrated to have excellent stability and lightfastness in automotive applications.

Toxicity

The Australian government's Department of Health and Aging, reported in its Summary Report: NA/238 that "Irgazin DPP Orange 16AOA is likely to be of low oral and dermal toxicity in humans and to be non irritating or very slightly irritating to the ey

History

Irgazin Orange was developed as a lead-free alternative opaque orange pigment. It is used in decorative, industrial, and automotive applications, often to color plastics and polymers.

Pigment Name

PR179-Perylene Maroon

Pigment Type

organic, anthraquinone

Chemical Formula

C26H14N2O4

Properties

Perylene Maroon is a transparent, dull to moderately dull, deep red pigment. Its transparency makes it useful as a glazing color.  Its mixing complement is Phthalo Green, and together they produce a pure black that is darker than most carbon-based pigments.

Permanence

Perylene Maroon has excellent permanence and lightfastness, and it can be an appropriate replacement for Anthraquinone Red in watercolor form.

Toxicity

Perylene Maroon 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.

Pigment Name

PR254-Pyrrole Red

Pigment Type

organic, aminoketone

Chemical Name

Bis-(p-chrolopheny)-1. 4-diketopyrrolo(3. 4-c)pyrrole

Chemical Formula

Properties

Pyrrole Red is opaque and has strong covering power. According to manufacturer Ciba, which uses the trade name Irgazin Red, it is a “clean, highly saturated mid shade red with high temperature resistance, excellent color strength, outstanding chemical, solvent and bleed resistance, and good weatherfastness.”

Permanence

Pyrrole Red is considered to have excellent lightfastness among organic pigments in its class. Tests in industrial applications have given it scores of 7-8 on the Blue Wool Scale.

Toxicity

According to the Australian government's Ministry on Health and Aging, "The notified chemical exhibited low oral and dermal toxicity in rats, did not exhibit toxic effects when administered orally to rats for 28 days, was not a skin irritant in rabbi

History

Pyrrole Red, used as an automotive paint and as a colorant in plastics, was developed as one of a range of pigments to replace lead based pigments. In art materials, it is often used as a synthetic and lightfast replacement for carmine, a laked pigment that was originally produced from the body of the cochineal insect. It is also used to replace the older naphthol reds, organic red pigments that are sometimes only marginally lightfast and weatherfast.