Impure cobalt oxide, formerly used to make smalt and blue enamels.
- ‘In Western literature the word zaffer was used to denote this pigment.’
- ‘In Europe, zaffre was used as early as the 14th century as a pigment for paints, glazes and glass.’
Mid 17th century: from Italian zaffera or French safre.
We take a look at several popular, though confusing, punctuation marks.