LYCOS RETRIEVER 
Cathode Ray Tube: Glass
built 291 days ago
CRT glass is shipped to CRT tube manufacturers and in assembling CRT tubes a substantial volume of CRT glass is broken. For many years the CRT tube manufacturers disposed of the broken glass... called cullet. Now the universal practice is to send the cullet back to the CRT glass manufacturers for recycling. CRT glass manufacturers have a high degree of confidence as to the composition of this recycled cullet since they know the glass was produced by their facility. The CRT glass manufacturers are recycling most, if not all, of this recycled CRT cullet.
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[B]ecause of the X-Ray hazard, the glass envelopes of most modern CRTs are made from heavily leaded glass. The lead in this glass may represent an environmental hazard, especially in the presence of acid rain leaching through landfills.
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The recycled cullet currently used is mostly glass received from tube manufacturers. This glass does not pose the risks of uncertain composition because the glass manufacturers manufactured the glass and know its composition. Thus, while the CRT glass manufacturers are using recycled cullet, the technological limits on using post-consumer cullet have yet to be addressed.
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