เครื่องลายครามอาหรับในศตวรรษที่ 9 เป็นเซรามิคส์ ไม่ใช่พอร์สเลน
The technique of cobalt blue decorations seems to have come from the Middle-East in the 9th century through decorative experimentation on white ware. Cobalt blue pigments were excavated from local mines in central Iran from the 9th century, and then were exported as a raw material to China.
The blue-and-white technique was fully developed in China with porcelain technology in the 14th century. On some occasions, Chinese blue and white wears also incorporated Islamic designs, as in the case of some Mamluk brass works which were converted into blue and white Chinese porcelain designs.
