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BlockxPaints

Blockx Artists' Watercolor - Blockx Red, 15 ml Tube

Watercolor

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  • Blick Art Materials
    $23.07 USDShop
    Recorded Oct 21, 2026, 8:06 AM UTC

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Product details
Size
15 ml
Blick SKU
01706-3120
About this product range

These artist grade watercolors continue the Blockx family legacy that began in 1865. They are made using the same processes developed many years ago.

Only the finest ingredients go into the manufacture of Blockx watercolors. Rare, tough pigments are ground slowly and repeatedly on stone mills to achieve the optimum particle size, and to eliminate overheating and iron pollution. The pigments are then blended with pure, light gum Arabic, honey made from selected flowers, and chemically pure glycerin and water.

The result is a variety of stable, transparent colors with wonderful working properties.

Pigment information

General reference notes about pigments can describe other media (such as oil). They do not verify this product’s exact formulation or behavior.

Pyrrole Red

Pigment code
PR254
Type
organic, aminoketone
Chemical name
Bis-(p-chrolopheny)-1. 4-diketopyrrolo(3. 4-c)pyrrole
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.
Description
Magnacryl Red, Versal Red, Microlith Red, Unisphere Red, Cromophtol Red, Irgazin Red.

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