Today I learned about oxblood. Here is what it says.
Oxblood is a
glossy, rich, bloodred glaze often slashed with streaks of purple or
turquoise used to decorate pottery, particularly porcelain. The effect
is produced by a method of firing that incorporates copper, a method
first discovered by the Chinese of the Ming dynasty, probably during the
reign of Wanli (1573-1620). Examples of this older work are now
extremely rare. The process was at first difficult to control, but it
had been mastered by the time of Kanxi (1661-1722) and Qianlong
(1736-96) in the Qing dynasty, and chuihong, or "blown red" glaze ware,
became popular. The langyao porcelain of the Qing dynasty was imitated
in Europe, especially in the porcelain factory at Sevres, France, which
produced a substantial amount of sang de boeuf in the late 19th century.
The process was also used by individual craftspeople, notably the
British potter Bernard Moore (1850-1935)
