How many years has Jianjian firing technology been lost?

Jianjian technology has been lost for nearly six hundred years, the Song death of Yuanxing, tea drinking customs change, coupled with frequent wars, a generation of famous porcelain Jianjian from prosperity to decline, the process was eventually lost, at this time, the blue and white porcelain gradually replaced the black glazed porcelain. Jianjian from the Ming Dynasty stopped burning so far has been more than 600 years. It is only recently that it began to re-fire. More Jianjian history can go to the public number of jianxing world weibo to understand.