- A black powdered oxide. An extremely strong, stable blue colorant in small quantities. Cobalt carbonate can be used as a substitute for cobalt oxide: approximately two parts cobalt oxide for three parts cobalt carbonate. Testing is recommended.
- CAUTION: This product may contain small amounts of hazardous components. Wear a NIOSH approved respirator. For further information contact: Rovin Ceramics at 734/424.3345