First introduced the silica raw material of the ordinary, ordinary silica gel material is sediment, his color will appear translucent or milky white color, but color silica gel material is transparent, translucent, appears milky white color is due to precipitation of impurities with ordinary silica material, hardness, elasticity, stretch compared to pure silica gel materials are relatively low, so the ordinary silica gel material factory for mobile phone keypad, silicone rubber key-press, remote control key, cipher keys, keys, silicone keypad scanner products, more should be used in the production of silicone products low.