Chinese Platter: "Qinghuaci" Blue and White Export Porcelain
Collection: Commercial Connections
Object Category: Decorative Objects, Ceramics
Object Type: Plates
Country: China
Continent: Asia
Geographic Region: Eastern Asia
Materials: Clay
width: 12 in;
height: 9.5 in;
depth: 1.25 in
This type of hand-painted underglaze blue and white plate was manufactured in China and is called "Chinese Export".
The type of glazing was developed in China in the 1300s. It became popular for ceramic ware shipped to foreign markets in the early 1600s. This painting on porcelain in underglaze cobalt blue is what became known today as 'blue and white'.
Source:
http://www.passionforthepastantiques.com/store/products/item/backPID/store/products/chinese-export-blue-white-porcelain-vase-c-1920/
https://en.wikipedia.org/wiki/Chinese_export_porcelain
https://en.wikipedia.org/wiki/Blue_and_white_pottery