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Made using an exclusive binder that provides more pigment with every stroke, QoR Modern Watercolors have all the subtlety, transparency, and flow of a great traditional watercolor, yet the colors embody the fire and vibrance of the best acrylic or oil paint — even after drying.
Color Swatches created using heavy application/diluted application and were applied on cold press watercolor paper (150 lb) material.
inorganic
bismuth orthovanadate or bismuth vanadium oxide
BiVO4
Bismuth Yellow is an intense, light value, semi-opaque yellow pigment with good tinting strength.
Bismuth Yellow has excellent lightfastness.
Bismuth orthovanadate is harmful if swallowed. It is irritating to the eyes, respiratory system, and skin. Exposure may cause conjunctivitis, rhinitis, and reversible irritation of the respiratory tract. More severe cases may cause bronchitis, bronchospasms, and asthma like disease. It may cause polycythemia, red blood cell destruction and anemia, albuminuria and hematuria, gastrointestinal disorders, nervous complaints, and severe cough. However, bismuth vanadium oxide is completely insoluble in water. This limits absorption and biological activity. In waterbased paints, it must be suspended in a binder vehicle. Because of low absorption, such clinical symptons are primarily limited to cases of long-term occupational exposure.
Bismuth orthovanadate occurs naturally in several minerals. Although it was synthesized in the 1920s, it was not developed as a commercial pigment until the 1970s.
Permanent Lemon Yellow, Vanadium Yellow.
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