| 摘要 |
The invention relates to an aqua blue glass composition having a base composition of a silicon-sodium-calcium glass containing the following main colouring agents: a total of iron, expressed as Fe2O3, in the range from 0.30 to 0.60% by weight, with a percentage ferrous (redox) in the range from 20 to 30; FeO in the range from 0.06 to 0.18% by weight; Ti02 in the range from 0.025 to 1.0 % by weight; CO3O4 expressed in the range from 5 to 30% ppm; Se expressed in the range from 0.1 to 10 ppm; CuO in the range from 0 to 400 ppm; and Cr203 in the range from 10 to 20 ppm. The glass has a light transmission value (illuminant A) greater than 50%; a dominant wavelength ([lambda]) between 487 nm and 498 nm; solar energy transmission of less than or equal to 64.4%; ultraviolet solar transmission of no more than 51.6%; and excitation purity of less than 12 for glass thicknesses between 4 and 12 mm. |
