The Carl Zeiss Foundation of Mainz in Germany wants the optics industry to
stop polluting landfills and tips with leaded glass (GB 2349639). Lead oxide is
traditionally added to glass to improve its optical properties and make it
easier to work with. But discarded lenses containing lead are an environmental
hazard. The foundation claims that a finely balanced mix of silica and boric
oxide has the same benefits as the lead. Adding oxides of barium, calcium and
aluminium further improves melting properties and transmission of blue
light.
More from New Scientist
Explore the latest news, articles and features
Technology
Test moderators use AI-generated writing to judge literacy standards
News
Technology
We should decide how AI shapes the future, not tech firms
Comment
Technology
Quantum voting could make elections more secure
News
Technology
DeepMind AI gives an extra day of warning ahead of deadly cyclones
News
Popular articles
Trending New Scientist articles