The lean plastic body like fire clay and fine fire clay in the moist condition is stored for several weeks or months to improve its plasticity before final shaping. In the real situation the non-plastic like grog materials are finely dispersed in the clay particles and the large surface area produced by this process enables the water to contact to each particle with formation of a gel. The formation of algae and bacteria is very high and it is helping to improve the plasticity.
The formation of humic acid due to break down of organic mater improves the dispersion of clay. The effect of weathering or aging varies between clay to clay and it is not a uniform result each individual clay yields after the weathering process.
To be contd………..
