Jun wares, produced close to the capital of Kaifeng, are related to the northern celadons and have a similar grey stoneware body. The distinctive features are their simple and formal shapes and the rich lavender-blue glaze derived from an iron oxide in the glaze and reduction firing. These qualities are well illustrated in these examples. Later in the Song dynasty and more particularly in the Yuan period, copper was added to the glaze to produce contrasting splashes of red.

'Jun ware', The Asian Collections, AGNSW, 2003, pg.105.