Asahi develops self-cleaning glass

Asahi Glass Co., Japan Carlit Co. and Toshiba Lighting & Technology Corp. announced on 8 May the development of a new process for coating glass with photo-catalytic titanium-oxide (TiO) to prevent the…

Asahi Glass Co., Japan Carlit Co. and Toshiba Lighting & Technology Corp. announced on 8 May the development of a new process for coating glass with photo-catalytic titanium-oxide (TiO) to prevent the build-up of dirt over extended periods of time. Developed in cooperation with a professor from Toyama University, the new self-cleaning glass has five times the dirt-busting ability of conventional TiO-treated glass and 30% greater durability. In the presence of ultraviolet light, TiO catalyzes the decomposition of organic molecules, working to keep surfaces clean. In the new process, the TiO powder is dissolved, then coated on the glass surface and baked to form a tightly adhering film over the glass. Used inside tunnels as the glass covers over tunnel lights, the new glass reportedly will continue to prevent the build-up of dirt on the lights for about 10 years.