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http://en.wikipedia.org/wiki/Pyrex#Composition http://en.wikipedia.org/wiki/Pyrex#Composition > According to glass supplier Pulles and Hannique, borosilicate P

by dalore 16y ago

http://en.wikipedia.org/wiki/Pyrex#Composition http://en.wikipedia.org/wiki/Pyrex#Composition > According to glass supplier Pulles and Hannique, borosilicate Pyrex is made of Corning 7741 glass, and is equivalent in formulation to Schott Glass 8830 glass sold under the "Duran" brand name.