The chemicals will destroy the materials and structures while providing the nice car.The degradation of organic matter in the raw material. And cross connection (cross-link) of the structure causes the pore.
Chemicals are added to destroy the structure of the material and while carbonic Nice to decomposition of organic substances in the raw materials and the cross connect (cross- link) of porous structure made up.
The chemicals added to destroy the structure of the raw material and as the carbonization.To the decomposition of organic materials in the raw material.And cross linking (cross -. Link) of the structure causes the porosity.