Splashed 'Sgraffiato' Dish - JB.1283, Origin: Central Asia, Circa: 1100 AD to 1200 AD, Collection: Islamic Art, Style: Sgraffiato Ware, Medium: Earthenware. Sgraffiato pottery belongs to one of the most important and earliest wares. It was believed that the technique was invented and introduced by the Copts in Egypt as early as the 4th and 5th centuries AD. Sgraffiato wares played an important role in Central Asian pottery during the 11th and 13th centuries. The technique involved incising the design into a ground slip and covered with a coloured or colourless transparent glaze.