| 摘要 |
<p>The patent relates to a yellow-green glass absorbing the whole range of the ultraviolet radiation particularly suitable for manufacturing bottles and other kind of containers for food. The glass has a yellow-green colour and its optical parameters obtained with test pieces 5 mm. thick are within the following range: Dominant wave-length: 573 +/- 3 nm. Filtering power : more than 99,5% Purity more than 90% Luminance : less than 15% s</p> |
