Coalport porcelain as vases, small boxes and table baskets. In 1820 Rose received the gold medal of the Society of Arts for his feldspar porcelain and an improved, lead-free glaze, with which the enamel colours fused in firing. Favourite patterns were the "worm sprig" and the "Tournai sprig" introduced by Billingsley at Pinxton, the Dresden-inspired "Berlin china edge", and the blue transfer willow pattern and blue dragon pattern. During the 1830s the factory initiated the practice of applying a light transfer printed blue outline, to guide the painters. This preserved some of the freedom of hand-painted decoration, while it enabled Rose to
Porcelain organised, and the kiln sites excavated from this period could fire as many as 25,000 wares. While Xing ware is regarded as among the greatest of the Tang dynasty porcelain, Ding ware became the premier porcelain of the Song dynasty. By the time of the Ming dynasty (1368–1644 AD), porcelain wares were being exported to Europe. Some of the most well-known Chinese porcelain art styles arrived in Europe during this era, such as the coveted "blue-and-white" wares. The Ming dynasty controlled much of the porcelain trade, which was expanded to Asia, Africa and Europe via the Silk Road. In 1517,