Clay is a kind of cohesive soil with little sand content, and it has good plasticity only when water does not easily pass through it. Generally speaking, clay is formed after silicate minerals are weathered on the earth's surface. Generally, it is weathered in situ, with large particles and composition close to the original stone. It is called primary clay or primary clay.
This kind of clay is mainly composed of silica and alumina, which is white and fire-resistant, and is the main raw material for preparing porcelain clay. Clay DIY allows children to discover beauty, appreciate beauty, experience beauty and express beauty with their own hands and young hearts, and at the same time, it also improves their artistic appreciation ability.
Although the process of making clay by hand seems complicated, when you try to make it, you will find the whole process very interesting, especially making some small animals with clay.
Clay minerals are widely distributed in rocks and soils all over the world. The world bentonite mineral resources are over 1.3Gt, mainly distributed in the United States and Canada. Kaolin ore reserves are about 1.6Gt, which are mainly distributed in China, the United States, the Soviet Union, Mexico, Spain and other countries. China is rich in kaolin resources, excellent in minerals and complete in genetic types. The main producing areas are Suzhou, Jiangsu, Xunxian, Hubei and xuyong county, Sichuan. Activated clay is mainly produced in the United States and Canada.
Clay can be divided into ceramic clay, refractory clay, brick clay and cement clay according to its properties and uses. Hard clay is often in block or plate shape, generally insoluble in water, and has high fire resistance. It is the main raw material of refractory products. Hard clay in refractory clay is used to make refractory materials for blast furnaces, lining bricks and plug bricks for iron smelting furnaces, hot stoves and steel drums. In the ceramic industry, hard clay and semi-hard clay can be used as raw materials for making daily-use ceramics, building ceramics and industrial ceramics.