LandGlass tempering furnaces – heating time settings

Some advice from LandGlass about the heating time settings for different types of glass.

  • Glass tempering furnaces heating time for glass with holes and grooves should be increased by 2.5 to 5 percent compared to ordinary glass with the same specifications.
  • Heating time for glass with a sharp corner, less than 30 degrees, should be reduced by 2.5 to 5 percent compared with ordinary glass. This kind of glass should be loaded in a way that the sharp corner will enter last. Place some waste glass around the sharp corner to prevent it from warping by absorbing heat too quickly.
  • The heating time for patterned glass should be determined according to the thickest part of the glass.
  • Compared to ordinary glass, the heating time for regular heat-reflective coated glass and tinted glass should decrease by an appropriate amount depending on the thickness and size of the glass sheet, usually 3 to 5 percent.
  • Tempering heating time for Low-E glass should increase by an appropriate amount compared with an ordinary glass of the same thickness, and S02 gas is not allowed; glass should be loaded with the coated side facing up to protect the Low-E coating.

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