| 摘要 |
A glass plate is distorted and toughened by heating the glass plate which is in contact with a distorting surface to a softening temperature, thereby distorting the surface of the glass plate and then toughening the glass plate. The distorting surface can be formed from silica particles of diameter 0.5-6 mm or from a textured surface. Toughening can be by cooling the glass after it has been heated to a temperature above its annealing temperature (e.g. to a temperature of 600-750 °C). Preferably the plate is annealed at a temperature of 540-550 °C for 15-60 minutes between the distorting and toughening steps. Glass plate produced by this process has an appearance which mimics antique hand-made glass but has the strength and safety benefits of toughened float glass. |
