Bleaching earth derived from the natural clay mineral bentonite has a purifying effect. It is formed by an acidic activation of bentonite, which changes its special layered structure: the ion exchange with the protons enables additional water to enter between the layers and the mineral swells.

108 with high purity and less impurities. Compare with 106, 108 has higher decolorization rate, reduced 20% usage, and It can reduce production cost obviously.