lusterware is pottery or porcelain with an irrodesent effect caused by the mettalic finish containing copper and silver or other materials. It’s history is anciant dating back to Egypt and Rome, true luster technology probably began sometime between the 4th and 8th centuries AD.
Lustre glazes were applied to pottery in Mesopotamia in the 9th century; the technique soon became popular in Persia and Syria and migrated to Spain and Italy. In the 18th century the English were the first to apply platinum glaze to earthenware. This created the look of more expensive sterling silver, the so-called “poor-man’s silver”. A process that was introduced by John Hancock and Josiah Spode, known as silver luster or English luster.
Firoozeh Khorrami, ASID