Pair of Lustered Mugs Artist: Karen Grubaugh of Art on Porcelain There modern mugs were painted in lusters with a Florentine gold finish. Since its creation in 9th century Baghdad, the art of luster was a closely guarded secret. Not until the 18th century was the formula discovered by Meissen artists. Treasured above all art mediums by the Crown Heads of Europe as few as six pieces out of every 100 created would be considered acceptable. Few artisans mastered the difficult medium then and today there are few luster artists worldwide. [Dishwasher safe]