Mount Vision Handmade Pastel - Cornflower Blue 221

Pigment Information

This color contains the following pigments:

PW6:1-Buff Titanium

PV15-Ultramarine Violet

PB29-Ultramarine [Blue]

PB15:3-Phthalo Blue

Pigment Name

PW6:1-Buff Titanium

Pigment Type

inorganic

Chemical Name

titanium dioxide

Chemical Formula

TiO2

Properties

Buff Titanium is an warm, reddish, off-white pigment that shares the properties of Titanium White, including opacity and slow drying time.

Permanence

Buff Titanium is lightfast and permanant.

Toxicity

Titanium dioxide and iron oxide are naturally occuring and are abundant in the Earth's crust. Both are considered non-toxic. Particle sizes tend to be larger in Unbleached Titanium than for titanium dioxide pigments used in white paints.

History

Titanium dioxide often occurs in nature with iron oxide. Buff or unbleached titanium is a natural mineral form of titanium dioxide. A variety of processes are used to produce buff or unbleached titanium. Some manufacturers may add synthetic iron oxides to a titanium base, while others use naturally occuring titanium ores that contain impurities. In this respect, Buff Titanium or Unbleached Titanium is a color that that may vary from one manufacturer to another.

Pigment Name

PV15-Ultramarine Violet

Pigment Type

inorganic

Chemical Name

complex silicate of sodium and aluminum with sulfur

Chemical Formula

H2Na(4-6)Al6Si6O24S2

Properties

Ultramarine Violet is a semi-transparent, dull purple to pale violet with low tinting strength. As a pigment, it is weak in most oil applications, but it performs better in water-based mediums, pastels, and chalks. It is generally the bluest of the violet pigments, although there can be significant differences in color across brands. It is not suitable for fresco work and does not mix well with yellows. Ultramarine Violet is a variant of Ultramarine Blue, and their pigment properties are identical.

Permanence

Ultramarine Violet has excellent permanence and lightfastness.

Toxicity

Ultramarine Violet has no significant hazards.

History

Unknown.

Pigment Name

PB29-Ultramarine [Blue]

Pigment Type

inorganic

Chemical Name

complex silicate of sodium and aluminum with sulfur

Chemical Formula

Na8-10Al6Si6O24S2-4 or Na6-8Al6Si6O24S2-4

Properties

Ultramarine is the standard warm blue, a brilliant blue pigment that has the most purple and least green in its undertone. It has a moderate to high tinting strength and a beautiful transparency. Synthetic Ultramarine is not as vivid a blue as natural Ultramarine. Ultramarine dries slowly in oil and tends to produce clean, though granular, washes in watercolor. French Ultramarine mixes well with Alizarin colors in oil and watercolor form to create a range of purples and violets. It can dull when mixed with white in acrylic form, but mixes well with other colors. The shade varies based on manufacturer. Considered a great color for glazes, it is not suitable for frescoing.

Permanence

Ultramarine has excellent permanence, although synthetic Ultramarine is not as permanent as natural Ultramarine. It may discolor if exposed to acid because of its sulfuric content.

Toxicity

Ultramarine has no significant hazards.

History

The name for this pigment comes from the Middle Latin ultra, meaning beyond, and mare, meaning sea, because it was imported from Asia to Europe by sea. It is a prominent component of lapis lazuli and was used on Asian temples starting in the 6th century. It was one of the most expensive pigments in 16th century Europe, worth twice its weight in gold, and so was used sparingly and when commissions were larger. Ultramarine is currently imitated by a process invented in France in 1826 by Jean Baptiste Guimet, making blue affordable to artists and extending the range of colors on their palettes.

Pigment Name

PB15:3-Phthalo Blue

Pigment Type

organic

Chemical Name

beta copper phthalocyanine

Chemical Formula

C32H16CuN8

Properties

Phthalo Blue PB15:3 is a structural variant of Phthalo Blue PB15 that produces more greenish tones.

Permanence

Phthalo Blues are completely lightfast and stable and are permanent for all paint uses. They are currently used in inks, coatings, and many plastics due to their stability and are considered a standard pigment in printing ink and the packaging industry.

Toxicity

Phthalo Blues have no significant hazards, although those made before 1982 contained some PCBs (polychlorinated biphenyls).

History

Developed by chemists using the trade name Monastral Blue, the organic blue dyestuff now known as Phthalo Blue was presented as a pigment in November 1935 in London. Its discovery was accidental. The dark color was observed in a kettle where a dye was being made from a British dyestuff plant. The demand for such a pigment came from commercial printers who wanted a cyan to replace Prussian Blue.