Beakers, high borosilicate 3.3 glassware, laboratory glassware.

GG-17 high polymer boron silicon glass, of the same type as American “PYREX” and Japanese “H-32” glass, possesses excellent physical and chemical properties. It is the best basic material used for instruments in the country and even in the world. Products made of such glass are excellent competitors in the world and very popular.

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GG-17 high polymer boron silicon glass, of the same type as American “PYREX” and Japanese “H-32” glass, 
possesses excellent physical and chemical properties. It is the best basic material used for instruments in the country and even in the world. 
Products made of such glass are excellent competitors in the world and very popular.
The following are the main technical targets of GG-17 glass:
1.Chemical Compositions:

SiO2 B2O3 Al2O3 R2O
80.50% 12.85% 2.10% 4.40%
2.Coefficient of linear expansion:
3.3×10-6 (20’C~300’C)
3.Properties of heat-resistance and fast change:
260’C~280’C (sample 250 ml breaking)
4.chemical properties:

Water-resistance Alkali-resistance Acid-resistance
Grade I Grade II Grade I

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