Bear Glass New Jersey Tempered Glass is made using special heated furnaces, which heat the annealed glass to a uniform temperature of approximately 1292 °F. When the glass exits the furnace, it is rapidly cooled. This rapid cooling puts the glass surface into a state of compression while the centre core remains in tension.
THERMAL TEMPERING
Tempering Process:
Bear Glass New Jersey Tempered Glass is made by uniformly heating annealed glass to a temperature of up to 1292 °F a nd immediately cooling it. The glass first goes through the furnace, carried in by rollers, where it is heated using three modes – conduction, convection and radiation. The rollers conduct the heat, while the coils help in the radiation of heat. The convection effect is brought about by hot air blowing through the nozzles, thus circulating the heat inside the furnace and making sure that the glass is heated evenly on all sides. This super heated glass then undergoes a rapid cooling process by a uniform and simultaneous blast of air on both surfaces. 
After tempering, the stress pattern developed by the glass is high, and the mechanical strength of tempered glass is four to five times higher than that of annealed glass.
Mechanical Strength of Bear Glass New Jersey Tempered Glass = 4 x Mechanical strength of Annealed Glass
When tempered glass is broken, all the stored energy is released at once and the glass breaks into small pieces.
Bear Glass Does Tempered Glass Table Tops
Characteristics of Bear Glass New Jersey Tempered Glass:
One problem that can also exist with tempered glass is spontaneous breakage, where the glass can break for no apparent reason. Spontaneous breakage occurs when nickel sulfide stones increase in size due to repeated heating and cooling.
For more information or to order your Bear Glass New Jersey Tempered Glass, please contact Bear Glass at:
FACTORY/ OFFICE
Address:
Bear Glass Inc.
399 20th Street
Brooklyn, NY 11215
Phone: 718-832-3604
Fax: 718-832-0786
E-mail: bearglass@yahoo.com
If you are in New Jersey:
Bear Glass New Jersey
359 Essex Road
Tinton Falls New Jersey 07753
P: 732 901 2626
F: 732 901 2266
E: Sales@BearGlassNJ.com