Manufacturing technology of pricked needle

The manufacturing process of the spike is as follows:

The firing of Jianzhan generally goes through 13 processes such as mineral processing, porcelain ore crushing, elutriation, batching, aging, mud refining, mud kneading, blank drawing, blank cutting, plain firing, glaze application, kiln loading and roasting.

Jianzhan benefited from its unique geographical advantages. The soil for making iron tires is not available everywhere, nor can it be made by taking some soil casually.

No matter from the tire soil or glaze color, minerals and mud with high iron content in Hou Jing Village and Chizhong Village of Jianyang Shuiji were selected for the building lamp, including hematite and plant ash for glaze, kaolin (high temperature soil) and clay for blank making, which is one of the reasons why the building lamp is precious.

It is very difficult to build a lamp. The mark of building a station was generated at a high temperature of 1300 degrees. The blank with such high iron content is very easy to deform and bubble, which is why we often see so many defects in building lamps.

20 1 1 On May 23rd, 2008, the kiln-building, lamp-building and firing techniques were approved by the people of China and the State Council, and included in the third batch of national intangible cultural heritage list, with the project number ⅷ- 188.

From Song Dynasty to Qing Dynasty, Fujian's "green glaze ware" obviously possessed the basic characteristics of porcelain. The texture is finer and harder than pottery, the tire color is mostly gray, the tire quality is basically sintered, and the water absorption is weak. The surface of pottery is coated with a layer of lime glaze, which is not exactly the same as porcelain. Known in the industry as "primitive porcelain" or "primitive celadon".