In 1986, researchers in Jingdezhen tried to make the porcelain using gas, but it turned out black. After several adjustments to the glaze formula, they finally produced porcelain with red under glaze using another substitute fuel.

During their experiments, the researchers also found out why ancient red under glaze porcelain ware bottles, bowls, plates, and boxes were no taller than 40 cm. The red under glaze could only be made within a specific temperature, with a temperature difference no more than five degrees Celsius. But in traditional kilns, the temperature dropped varied by about ten degrees Celsius for every meter away from the furnace.

Modern gas kilns have relatively steady temperatures and with their help, Jingdezhen craftsmen finally made three 62cm tall vases with beautiful red under glaze, which were presented to Japanese and Turkish governmental heads.

Another porcelain with red under glaze that could withstand very high temperatures was produced recently in Hunan Province. Its color and quality are as good as Jihong porcelain, and the mysterious ancient technique was finally revived. The new porcelain is named "Chinese Red Porcelain."

Author: Jeff

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