Impure cobalt oxide, formerly used to make smalt and blue enamels.
More example sentences
- In Europe, zaffre was used as early as the 14th century as a pigment for paints, glazes and glass.
- In Western literature the word zaffer was used to denote this pigment.
mid 17th century: from Italian zaffera or French safre.
Definition of zaffer in:
- The British & World English dictionary