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Date Created
Mon, 2nd Jul 2007
Updated By
Wallace Rogers
Date Modified
Tue, 20th Dec 2016

   What does hard glass and soft glass mean?


What does hard glass and soft glass mean?


“Hard-glass” is an acronym for borosilicate glass, like Pyrex or Kimax. “Soft-glass” is an acronym for soda-lime glass, or a higher expansion type glass, (88-92 COE). Lab glass is generally made from “hard-glass”, (borosilicate). Bottles are generally made from “soft-glass,” or soda-lime glass.