3-19mm Tempered Ultra Clear Glass

3-19mm tempered ultra clear glass

Ultra clear glass is also called super clear glass, or crystal clear glass, it is in fact low iron glass chemically. Compared to normal iron glass, it has high light transmittance and better appearance, are widely used on building for inside decoration, outside decoration, museum display case, shopping mall showcase, etc. Visible light transmittance for normal glass is about 85%, for ultra clear it is not lower than 91.6%. Normal glass has green edges, and ultra clear glass has blue edge, as the following picture shows:

Physical parameters of ultra clear glass:

1. elasticity modulus: 73.1Gpa

2. Knoop hardness: 41.4 Mpa

3. Density:  2.5076kgf/mm²

4. Transformation temperature: 556℃

5. Intenerate temperature or yield point: 606℃

6. Softening point: 710℃

7. Annealing point: 547℃

8. Strain point: 513℃

9. Liquid phase temperature: 1008℃