Impure cobalt oxide, formerly used to make smalt and blue enamels.
钴蓝色素，花绀青（一种含杂质的氧化钴，早期用于制蓝玻璃及蓝色搪瓷）
Example sentencesExamples
- 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.