Lasers recycle CRT funnel glass

June 29, 2005
June 29--Citiraya Recycling Technology is using laser cutting to recycle CRTs from TVs and PC monitors

June 29--At its Mid-Glamorgan plant, Citiraya Recycling Technology is using laser cutting to recycle CRTs from TVs and PC monitors.

"The funnel glass contains a high degree of lead oxide whereas the panel glass has no lead," says plant manager Robert Noakes. "Remanufacturers of funnel glass can accept slight panel glass contamination in their funnel glass recyclate, but the remanufacturers of panel glass demand a pure, uncontaminated glass source."

There are other CRT glass separation techniques, including sawing and thermal crack induction, that are also suitable for CRT remanufacturing.

During laser cutting, the tube sits face down on a turntable and the laser cuts part-way through its thickness just below the frit seal glass, which joins the two components, and contains up to 65 percent lead, said Noakes.

The process takes 30 to 90 seconds depending on the tube size and the plant can handle 450,000 to 500,000 CRTs per year, estimated to be about five to eight percent of the UK's CRT waste output in any one year, according to the firm.

About half the weight of a TV is the CRT and WEEE legislation requires producers to prove 65 percent of the weight of discarded TVs and monitors is recycled, which makes effective glass recycling essential, said Noakes.

For more information, visit

This article, written by Steve Bush, originally appeared on

Sponsored Recommendations

Video: December 8, 2023 Photonics Hot List

Dec. 8, 2023
In this episode, we cover a microscopy method that hits uncharted cell territory, drone-based imaging for solar farm inspection, soliton microcombs that boost conversion efficiency...

China’s industrial laser market shows steady growth in turbulent times

Dec. 8, 2023
This in-depth market update focuses on trends in laser processing and industrial lasers while touching on what to expect in the ultrafast laser, fiber laser, LiDAR, and handheld...

What does it take to land venture capital for photonics-driven startups?

Dec. 7, 2023
Capital to grow a startup company can come from many sources: contract and non-recurring engineering (NRE) funding, angels and friends, customer upfront payments, and venture ...

Looking beyond the incremental: Reimagining optical devices

Dec. 7, 2023
Rob Devlin, co-founder and CEO of Metalenz, shares the significant people that forged his path to developing one of the most promising optics companies in the world today.

Voice your opinion!

To join the conversation, and become an exclusive member of Laser Focus World, create an account today!