How to make tofu?

Soybean, the raw material of tofu, is rich in protein, and its protein content is 36-40. After soaking in water, grinding, deslagging and heating, protein colloid (mixture of solution, suspension and emulsion) is obtained.

The ionic charge adsorbed on the surface of colloidal particles was neutralized by aqueous solution of crystalline magnesium chloride, so that protein molecules were condensed and tofu was obtained.