PYREX® brand borrosilicate glass is characterized by low coefficient of linear thermal expansion and high thermal shock resistance, because Na2O and K2O contents are low while it contains high B2O3.
Abrasion as well as scratch and squeeze hardness is also excellent. Due to its superior melting technique. PYREX® brand borosilicate glass does not require fluxing agents and, therefore, neither bubble nor coloring appear even during fabrication process by gas.
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