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Grumbacher Pre-Tested Artists' Oil Color - Thio Violet, 1.25 oz tube

Pre-Tested Artists' Oil Color

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$11.01

Blick Art Materials · recorded Oct 21, 2026, 1:18 PM UTC

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Product details
Size
37 ml
Blick SKU
00448-6553
About this product range

Tested and approved by professionals, for professionals, Grumbacher Pre-Tested Professional Oils have been one of America's favorite oil paints since 1905. Recently reformulated, the line now includes stronger, purer cadmiums and exciting contemporary colors.

Grumbacher Pre-Tested Oils are made with the finest pure pigments milled in select alkali-refined linseed oil, with the exception of the Whites described below. All 90 colors are highly pigmented, with tinting strength equal to or better than the leading professional brands. Pre-Tested Oils offer high chroma, superior tinting strength, excellent adhesion, outstanding working properties, the utmost lightfastness, and archival permanence.

Superba White is a smooth, buttery, heavy-bodied white ground in non-yellowing poppy seed oil. Superba is unaffected by exposure to light, freely intermixable with other colors, and offers enhanced opacity and tinting strength.

Titanium White is a permanent, heavy-bodied, versatile, opaque, pure white that is neutral in hue. It's ideal for applications where great opacity is required, and is considered the strongest tinting white.

Soft Titanium White is a permanent soft-bodied, opaque, non-yellowing Titanium White that is ground in poppy seed and sunflower oils, rather than linseed oil. These oils do not yellow with age, as does pure linseed oil. Soft Titanium White is also recommended for fluid wet-in-wet techniques.

Zinc White is a permanent, heavy-bodied, semi-opaque, cool white. It's designed especially for brilliant clear tints with all oil colors, and is excellent for glazing.

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.

Quinacridone Magenta

Pigment code
PR122
Type
organic, quinacridone
Chemical formula
C22H16N2O2
Properties
Quinacridone Magenta is a semi-transparent and powerful bluish red with an impressive mixing range. It makes an excellent glazing color and is one of the bluest of the Quinacridone colors. The pigment's properties vary considerably, depending on how it is ground. Quinacridone pigments have relatively low tinting strength in general. For this reason, quinacridone colors are often expensive, because more pigment is required in the formulation.
Permanence
Quinacridone Magenta offers very good lightfastness in most media, but some have argued that it is less lightfast in watercolor form. Although Quinacridone Magenta received only a passing grade of "fair" under ASTM test protocols, other test results have rated the pigment very good to excellent. Transparent reddish violet pigments in general have more problems with lightfastness than any other range of colors. PR122 is often used as the Magenta of CMYK (four color) process printing because it offers a better tradeoff between tinting strength and lightfastness than other pigments in its class.
Toxicity
Quinacridone Magenta has no acute hazards. Overexposure to quinacridone pigments may cause skin irritation. Quinicridone pigments contain a compound found to be a skin, eye, and respiratory irritant.
History
Quinacridone Magenta came from a red violet aniline dye that was first produced in 1858 by Natanson. It was called Magenta to commemorate a battle in Magenta, Italy. Over time, Magenta became the standard color name for a deep, violet red. Although quinacridone compounds became known in the late 19th century, methods of manufacturing so as to make them practical for use as commercial pigments did not begin until the 1950s. PR122 has become particularly popular in the formulation of Magenta for CMYK process printing.
Description
Acra Red, Quinacridone Violet (PV19), Thalo Red Rose.

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