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Great American Art Works' has discovered new materials, techniques, and equipment they use to create uniquely excellent pastels. These handmade soft pastels are richly pigmented, and have superb brilliance of tone.
Color Swatches created using heavy to light application and were applied on 100 lb (163 gsm) drawing paper material.
Calcium carbonate, the mineral constituent of chalk, is a low tinting strength, inexpensive white pigment that is often used is a buffer and filler. Because of its low tinting strength, it is overwhelmed by other colors. It is used in gesso and other coatings to give the surface more tooth, a desirable characteristic for some painting techniques.
Calcium carbonate is lightfast. Like all carbonates, it reacts with strong acids
Calcium carbonate is completely non-toxic, and is used in many food, cosmetic, and pharmaceutical products. However, excessive consumption is not recommended.
Naturally occuring chalk deposits have been mined since prehistoric times. Rocks and minerals that contain calcium carbonate include aragonite, calcite, vaterite, chalk, limestone. marble, and travertine. Calcium carbonate is the principle component of lime, used in many agricultural and industrial applications.
Chrome Yellow is a relatively inexpensive pigment with excellent covering power. It has only fair to poor chemical stability, although modern varieties of this pigment are photochemically stabilized. This pigment is quick drying in oil. Darker shades of Chrome Yellow have been known to brown over time and blacken when in contact with sulfur bearing air. A green color sometimes results when it is mixed with organic pigments. Cadmium Yellow has been considered a suitable replacement for Chrome Yellow for over 160 years.
Chrome Yellow is more permanent in darker shades than lighter ones, and it is more permanent in oil than watercolor. Its lightfastness ranges from fair to poor. Overall, it is not suitable for permanent painting.
Chrome Yellow is a known human carcinogen. It is extremely toxic if inhaled and highly toxic when ingested or put in contact with skin. Evidence of Chromium(III) carcinogenicity is inconclusive. Chromium(III) salts appear in greenish pigments. Chromium(VI) salts, which appear in yellowish pigments, have been proven to cause cancer. WARNING: This product contains a chemical known to the State of California to cause cancer.
In 1797, the Parisian chemist Louis Nicholas Vauquelin isolated natural lead chromite (chrocoite). Its name came from the Greek word khroma, meaning color, because of the range of hues that could be derived from it. The use of chrome colors was limited until a substantial supply of chrome ore was found in North America, allowing large scale production.
Leipzig Yellow, Paris Yellow.
organic, naphthol AS
Pigment PR210 is a semi-transparent, bluish red pigment.
Pigment PR210 has very good lightfastness, but its performance is considered inferior to PR170, another naphthol red.
Naphthol Reds are not considered toxic. They may cause eye, skin, or respiratory irritation. Contact with dry pigment should be avoided.
Pigment PR210 is used primarily in inks and waterbased paints.
Sunbrite Red 210, BON Arylamide Red, Permanent Red F6RK.
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Material Safety Data Sheet
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