R&F Encaustic Block, Cobalt Yellow 40ml

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. One of the only transparent yellows that is reliable lightfast. Mixes slightly to the greenish.

• 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

Pigment Type: Inorganic

Chemical Composition: Potassium cobaltinitrite

Properties

Cobalt Yellow is an expensive, transparent, very 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 it is useful in glazes and for tinting.

Permanence

Cobalt Yellow has good permanence and lightfastness, and it 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 kobolt, an underground goblin, because miners thought cobalt harmed silver ores. The discovery of the potassium and cobalt compound used to make Cobalt Yellow is credited to N.W. Fischer in Breslau in 1848. It was not introduced as an artists’ pigment until 4 years later, by Saint-Evre in Paris. During the previous century, it was considered the only colour that could reasonably replace Indian Yellow.