How Auto Glass Is Made
The Tempering Process:<p>The tempering process begins by cutting raw glass to an exact size and shape then smoothing the sharp edges. Side and rear windows must undergo a silk screening process. For example, the electric circuit for heated rear windows is screened on with a silver ceramic paste which bonds to the glass as it bakes. The bending process follows in which   glass is transported through a furnace with temperatures as high as 1500 degrees Fahrenheit. Curved rolls, presses or bending rings are used to shape the hot glass and then pressurized air cools it quickly. The window looks like ordinary glass but it is much stronger but if tempered glass does break it disintegrates into small fragments with rounded edges. The tempering process makes auto glass stronger and safer!