The tempered glass and semi-tempered glass are all high strength glasses produced by firstly processing the flat glass to a shape upon actual demand, and then sending to the toughening furnace to heat, and then quenching when the glass reaches the softening point. The surfaces of these glasses possess powerful and even compressive stress, and the tensile stress lies in the center layer. The tensile stress from the external pressure is counteracted by the compressive stress of the glass surface, so that the mechanical strength of the tempered glass is greatly increased. Our company currently adopts the leading Landi LD-2030b10c30 tempering furnace, integrating flat temper, large bending temper with small bending temper, which effectively guarantees the stability and safety of the products. Quality shall meet the following standards: ·GB/T9963-1998 National Standard of Tempered Glass; ·GB17841-1999 National Standard of Tempered glass and Semi-tempered Glass Used in Curtain Wall ; ·USA ANSIZ97.1; ·Japan JISR