Cobalt yellow (commonly called aureolin) is a potassium cobalt nitrite. The compound was discovered in 1831 but not introduced as a pigment until after 1851. It is an intense yellow that has high tinting strength and low opacity, popular as a watercolor. In watercolors, cobalt yellow is a transparent, lightly staining, intense yellow.
Rublev Colours Cobalt Yellow (Aureolin) Watercolor Note: Colors swatches are shown in mass tone, at top, mixed with an equal amount of water and brushed out toward the bottom. All pictures of color swatches in this web site are only approximations of the actual color of the watercolor paint. We have taken every care to match the color in these pictures on calibrated color monitors to the actual color. However, because of the wide variance in color monitors the results you get may vary.
Dutch: kobalt geel English: cobalt yellow French: jaune de cobalt German: Kobaltgelb Italian: giallo di cobalto Spanish: cobalto amarillo
Cobalt Yellow (Aureolin)
Pigment Yellow 40 (77357)
Hydrated Tripotassium Hexanitrocobalt(II)
Note: Some separation of pigment and medium may occur in Rublev Colours Watercolors and is a natural process when no stabilizers are added to paint to prevent this from occurring.
Single Pigment: Cobalt Yellow (Aureolin) Binder: Gum Arabic Color: Yellow Color Index: Pigment Yellow 40 (77357) Chemical Name: Hydrated Tripotassium Hexanitrocobalt(II) CAS Number: 13782-01-9 ASTM Lightfastness Rating: II Opacity: Transparent Tinting Strength: High Staining: Low Granulating: Low
Natural Pigments is a limited liability company based in Willits, California. We manufacture and distribute rare and hard-to-find materials for fine artists and decorators. We specialize in supplying artists' materials that were used in historical painting since pre-historic times up to and including the nineteenth century.
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