... of different varieties of silica with moisture permeability. The main raw material of silica gel is a high-porous silica SIO2 ... absorption. Thus,it has widely used in instruments,meter,equipments,leather,bags,shoes,textiles,food,medicines to control the relative humidity ... package 3.it has widely used in instruments,meter,equipments,leather,bags,shoes,textiles,food,medicines to anti-mold Application.