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Being leader neutral glass tube manufacturer in China, we produce neutral glass tube of Type I Clear and Type II Amber according to ISO standard size or special demand specification.
The Chemical composition
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SiO2
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AL2O3
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B2O3
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CaO
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BaO
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Na2O
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K2O
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Fe2O3
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Others
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70¡À1
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5.5¡À0.2
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8.0¡À0.2
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3.1¡À0.2
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2.0¡À0.2
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11.1¡À0.5
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0.05¡À0.05
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0.25¡À0.05
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The Physical properties
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Expansion
Coefficient
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Density
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Water--
resistance
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Acid¡ª
resistance
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Softening
point
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(69¡À0.5)
¡Á10-7/¡æ
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2.45¡À0.02 g/cm3
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First class
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First class
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750¡æ
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