Sennelier Watercolour S2 Cobalt Violet Deep Hue (913)
Cobalt Violet Deep Hue (913) Manganese Violet is a semi-transparent, bluish-violet pigment with a discrete opacity and low tinting strength. It is the reddest of the violets. It performs well in pastel, encaustic, and watercolour. There can be significant differences in colour across brands. It shares similar properties with bluish shades of Cobalt Violet.
Quinacridone Magenta is a semi-transparent, robust bluish-red with an impressive mixing range. It makes an excellent glazing colour and is one of the bluest of the Quinacridone colours. The pigment's properties vary considerably, depending on how it is ground. Quinacridone pigments have relatively low tinting strength in general.
Pigment Name: PV16—Manganese Violet
Manganese Violet is a semi-transparent, bluish-violet pigment with a discrete opacity and low tinting strength. It is the reddest of the violets and covers and dries well in oil and tempera. It also performs well in pastel, encaustic, and watercolour. Manganese Violet is not well suited for fresco or acrylic painting. There can be significant differences in colour across brands. It shares similar properties with bluish shades of Cobalt Violet. Chemical Name: manganese ammonium pyrophosphate
Permanence: Manganese Violet has excellent permanence and lightfastness, and it is one of the most lightfast, balanced violets in watercolour form.
Toxicity: Manganese Violet is highly toxic if inhaled and moderately toxic if ingested.
History: E. Leykauf developed this pigment in 1868 to replace the more expensive Cobalt Violet. It was not offered as an artist’s pigment until 1890.
Alternate Names: Burgandy Violet, Mineral Violet, Nürnberg Violet, Permanent Violet.
Pigment Name: PR122—Quinacridone Magenta
Quinacridone Magenta is a semi-transparent, robust bluish-red with an impressive mixing range. It makes an excellent glazing colour and is one of the bluest of the Quinacridone colours. 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 colours are often expensive because more pigment is required in the formulation.
Permanence: Quinacridone Magenta offers excellent lightfastness in most media, but some have argued that it is less lightfast in watercolour form. Although Quinacridone Magenta received only a passing grade of "fair" under ASTM test protocols, other test results have rated the pigment from very good to excellent. Transparent reddish violet pigments generally have more problems with lightfastness than any different range of colours. PR122 has often been used as the Magenta of CMYK (four-colour) 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. However, overexposure to quinacridone pigments may cause skin irritation. Quinacridone pigments contain a compound that is 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 colour name for a deep, violet red. Although quinacridone compounds became known in the late 19th century, manufacturing methods 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.
Alternate Names: Acra Red, Quinacridone Violet (PV19), Thalo Red Rose.
