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Tempered Glass

GOLDEN FAITH TEMPERED GLASS  is a type of glass that has increased strength and will usually shatter into small fragments when broken.
      Toughened glass is strong, has enhanced thermal resistance, and breaks into small cuboid fragments rather than irregular shards of glass.
    Toughened glass is used when strength, thermal resistance and safety are important considerations, such as in microwavable see-through cookware. Other forms of tempered glass are Borosilicate glass for baking by Pyrex and Arcuisine, ceramic-glass dinnerware by Corelle and Arcopal and bakeware and stovetop pots by Arcoflam. Within the home, tempered glass can be found in display case windows, shower doors, glass patio doors, glass dinnerware and drinking glasses. In commercial structures, tempered glass is used for unframed assemblies such as frameless doors, structurally loaded applications and any that would be dangerous in the case of a human impact.
     Toughened glass is made from annealed glass via a thermal tempering process. The glass is placed onto a roller table, taking it through a furnace that heats it to above its annealing point of 600 ˇăC. The glass is then rapidly cooled with forced draughts of air while the inner portion of the glass remains free to flow for a short time.
     Toughened glass is typically four to six times the strength of annealed glass and withstands heating in microwave ovens.
     Toughened glass must be cut to size or pressed to shape before toughening and cannot be re-worked once toughened. Polishing the edges or drilling holes in the glass is carried out before the toughening process starts. Due to the balanced stresses in the glass, damage to the glass will eventually result in the glass shattering into thumbnail sized pieces. The glass is most susceptible to breakage due to damage to the edge of the glass where the tensile stress is the greatest, but shattering can also occur in the event of a hard impact in the middle of the glass pane or if the impact is concentrated (for example, striking the glass with a point). Using toughened glass can pose a security risk in some situations due to the tendency the glass has to shatter completely upon hard impact.