R&F Encaustic Paint Block - Cobalt Yellow, 40 ml
Has a mustardy top tone but a vivid golden undertone. This is an excellent glazing colour. It is one of the only transparent yellows that is reliable and lightfast. Mix slightly to the greenish.
Cobalt Yellow (synthesized Aureolin) is a transparent,
lightly staining, light-valued, intense medium yellow pigment sparingly used in
oil and watercolour painting. Nikolaus Wolfgang Fischer first made Aureolin in Breslau
in 1831, while Edouard Saint-Evre synthesized it independently. He is credited
with introducing cobalt yellow as an artist's pigment.
- Pigment Composition: PY40-Cobalt Yellow
- Paint Lines: Encaustic, Pigment Stick
- Opacity: Transparent
- Pigment Stick Drying Rate: Fast
- Classification: Synthetic Inorganic
- Chemical Composition: Potassium cobaltinitrite
- Safety Information: Conforms to ASTM D-4236
- Safety Warnings: This product contains cadmium, a chemical known to the State of California to cause cancer.
Pigment Name: PY40-Cobalt Yellow
Classification: Inorganic
Chemical Composition: Potassium cobaltinitrite
Properties
Cobalt Yellow is an expensive, transparent, pure yellow with only fair hiding power. It is reliable in watercolour and makes particularly good tints. However, it must be carefully manufactured in oil form, or it can brown. Cobalt Yellow is known for good mixing quality with all other pigments and is useful in glazes and tinting.
Permanence
Cobalt Yellow has good permanence and lightfastness and can withstand strong sunlight.
Toxicity
Cobalt Yellow is highly toxic by inhalation or ingestion. The ingestion of this pigment has caused cyanosis (low oxygen levels in the blood) due to methemoglobinemia.
History
Cobalt comes from the Middle High German word kobold, an underground goblin because miners thought cobalt harmed silver ores. N.W. In Breslau in 1848, Fischer discovered the potassium and cobalt compound used to make Cobalt Yellow. Four years later, Saint-Evre in Paris introduced it as an artist’s pigment. During the previous century, it was considered the only colour that could reasonably replace Indian Yellow.
