Professional colors contain finest pure pigments, milled in alkali-refined linseed oil. High chroma, superior tint strength, excellent adhesion, light-fastness, and archival permanence.
Color Swatch created using heavy application/medium application/50% tint and was applied on acrylic primed canvas (7 oz) material.
complex silicate of sodium and aluminum with sulfur
Na8-10Al6Si6O24S2-4 or Na6-8Al6Si6O24S2-4
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.
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.
Ultramarine has no significant hazards.
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.
Artificial Ultramarine, French Blue, French Ultramarine, Gmelin's Blue, Guimet’s Blue, Permanent Blue, Royal Blue, Synthetic Ultramarine. New Blue describes particular shades of Ultramarine. Armenian Blue and Lazuline Blue are names for genuine Lapiz Ultramarine. Sky Blue is a pale tone of Ultramarine.
Because it is well established as a yellow food dye, Tartrazine is subject to a great deal of research on safety in many countries. Tartrazine has been claimed to cause allergic and intolerance reactions. Because of the problem of Tartrazine intolerance, the United States requires the presence of Tartrazine to be declared on food and drug products. There have been periodic allegations that consumption of Tartrazine, possibly in association with a common preservative, is associated with hyperactivity disorders. Several national food agencies have recommended a voluntary phase-out of Tartrazine .
Tartrazine is a yellow dye used primarily in foods, drugs, and cosmetics. It is derived from coal tar.
E102, FD&C Yellow 5
disodium salt of 6-hydroxy-5-[(4-sulfophenyl)azo]-2-naphthalenesulfonic acid
FD&C Yellow #6 is an orange-yellow pigment with moderately low tinting strength.
Although its lightfastness as an artist pigment has not been fully investigated, researchers in the food and additives industry report that it has very good light stability, and that it meets standards for use in cosmetics such as lipstick and hair dyes. However, tests of the pigment as a colorant for plastic (aluminum lake of FD&C Yellow #6) indicate that it has only moderate lightfastness, and should be used only in indoor applications.
FD&C Yellow #6 is approved in the United States for use in food, drugs, and cosmetics with appropriate labeling and certification.. It is known as Sunset Yellow in the food industry. It is often used to make confections or baked goods appear richer in color. Because it is well established as an orange-yellow food dye, Sunset Yellow is subject to a great deal of research on safety in many countries. Sunset Yellow has been claimed to cause allergic and intolerance reactions. Several national food agencies have recommended a voluntary phase-out of Sunset Yellow.
FD&C Yellow #6 is a coal tar derivative. It has been used as a food colorant since 1929.
E110, Orange Yellow S, Sunset Yellow, Quinoline Yellow
® Grumbacher is a registered trademark of Chartpak.