Color Swatch created using heavy application/medium application/50% tint and was applied on acrylic primed canvas (7 oz) material.
cobalt ammonium phosphate
Cobalt Violet PV49 is a lightfast, semitransparent, nonstaining, light violet pigment with low tinting strength. Because of its high cost and low tinting strength, it is generally used only in pure applications.
Cobalt ammonium phosphate is completely lightfast. Because of its low tinting strength, tints are susceptible to color shifts, as other materials undergo changes.
Cobalt ammonium phosphate is toxic.
Cobalt comes from the Middle High German word kobolt, an underground goblin, because miners thought cobalt harmed silver ores. Cobalt Violet was the first real violet pigment and was described by Salvetat in 1859. The light variety of this pigment, developed in Germany earlier in the 19th century, was particularly poisonous due to its arsenic content. Cobalt Violet hues were the only permanent bright violets available to artists until the