Patent ID: 8460455

Claim:
A method of manufacturing an air clay, comprising: selecting at least one raw material from a group consisting of sand powder, shell powder, crop powder and a mixture thereof; finely grinding the raw material to prepare a base material having a particle diameter of about 0.02 mm to about 0.2 mm; adding about 10 wt. parts to about 30 wt. parts of glycerin to about 100 wt. parts of the base material; mixing and kneading these materials together to form a paste; and adding about 0.1 wt. parts to about 9 wt. parts of a liquid coagulating agent for water treatment to the paste and mixing these materials together, wherein the air clay is configured to absorb air and become loose and fluffy by stretching the air clay while the air clay releases air and returns to a dense and hard state by kneading and compressing the air clay.