We use high grade crystal glass to manufacture touch switch crystal glass panel. Crystal glass is made of molten glass which flows through tweel to tin bath and then to lehr. It also be called ultra clear glass or extra clear glass. While floating through the molten tin, the glass under the works of gravity and surface tension becomes smooth and flat at both sides.The crystal glass has higher light transmittance than ordianry glass. It is wildly use as switch glass panel.