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发帖数: 21396 | 1 当然没Lead：
http://en.wikipedia.org/wiki/Pyrex
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.[12] The composition of both
Corning 7740 and Schott 8830 is given as 80.6% SiO2, 12.6% B2O3, 4.2% Na2O,
2.2% Al2O3, 0.04% Fe2O3, 0.1% CaO, 0.05% MgO, and 0.1% Cl. |
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