- an artificial mixture, resembling smalt, containing cobalt oxide and, usually, silica, used to produce a blue color in glass and in ceramic glazes.
Origin of zaffer
1655–65; < Italian zaffera, perhaps < Latin sapphīra sapphire
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for zaffre
Zaffre is now made from the cobalt ores found in these hills.
The first practical use of cobalt was in the form of zaffre or cobalt blue.
Zaffre is the roasted mineral ground with sand, while smalt, a term used more frequently, is the fused mixture with sand.
A little oxide of cobalt or zaffre is frequently added to alter the shade.
Zaffre, digested in aqua regia, and diluted with four times its weight of water, is sometimes employed; a green tint results.The Short-story
William Patterson Atkinson
- impure cobalt oxide, used to impart a blue colour to enamels
C17: from Italian zaffera; perhaps related to Latin sapphīrus sapphire
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012