Pure sky blue, mixed in France from organic earth, cobalt(II)-stannate and trace minerals, first used as a pigment in the 1860s. Lightfast, limited hiding power. mixes with all mediums and pigments; not recommended for watercolor washes due to chalkiness. Good for oil paints, especially for skies in landscape paintings.
AKA: Sky blue, [Lat] caelum (heavenly, sky), [Fr] bleu ciel, bleu celeste, [Ger] coelin blau, [It] blu cerule
Painting a printed Medieval illustration in a pigment workshop. This beastie is cerulean blue.
Cerulean blue goblet painted by Elizabeth Comer
General protective measures: Always wear a dust mask, gloves, apron and eye protection.