| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat-resistant tempered glass capable of satisfying fire shielding performance, even if surface compressive stress is small; and to provide a production method of the heat-resistant tempered glass.SOLUTION: A tempered glass obtained by subjecting a glass plate 1 cut into a prescribed size to physically strengthening treatment has a ridge part polished surface 1c tilted to a glass plate surface 1a and an end face 1b, and the ridge part polished surface 1c has an angle of 135-170 degrees formed with the glass plate surface 1a, and in a chip of a corner part 1d formed by the ridge part polished surface 1c and the glass plate surface 1a, the length in the ridge line direction is 200 μm or less, and the maximum width in the vertical direction to the ridge line is 100 μm or less. |
