Zaffre, a pre-scientific substance (see List of alchemical substances), is a deep blue pigment obtained by roasting cobalt ore, and is made of either an impure form of cobalt oxideClayArt or impure cobalt arseniate. During the Victorian Era, zaffre was used to prepare smalt and stain glass blue.

1. The artist mixed zaffre with white to create a pale blue hue for the sky.
   藝術(shù)家將鈷藍(lán)與白色混合，創(chuàng)造出一抹淡藍(lán)色的天空。
2. Zaffre is one of the oldest pigments known to mankind, originally obtained from cobalt ores.
   鈷藍(lán)是人類已知的最古老的顏料之一，最初是通過鈷礦石提煉得到的。
3. The ceramic pieces were decorated with a deep shade of zaffre, giving them an elegant and timeless look.
   這些陶瓷作品用深藍(lán)色的鈷藍(lán)裝飾，賦予了它們一種優(yōu)雅且永恒的外觀。
4. Zaffre was historically used to color glass and ceramics, particularly in the Middle Ages.
   鈷藍(lán)在歷史上曾用于給玻璃和陶瓷上色，尤其是在中世紀(jì)時期。