Editing Cathode-ray tube (section)

===Toxicity===
Older color and monochrome CRTs may have been manufactured with toxic substances, such as [[cadmium]], in the phosphors.<ref name="auto93"/><ref>{{cite web |url=http://takebackmytv.com/pages/toxic_tvs |title=Toxic TVs |access-date=13 April 2010 |publisher=Electronics TakeBack Coalition |url-status=dead |archive-url=https://web.archive.org/web/20090227041627/http://takebackmytv.com/pages/toxic_tvs |archive-date=27 February 2009}}</ref><ref>{{cite web |url=http://e-stewards.org/wp-content/uploads/2010/03/OccupationalRisksCRTGlassProcessing1.pdf |title=Occupational Risks Associated with Electronics Demanufacturing and CRT Glass Processing Operations and the Impact of Mitigation Activities on Employee Safety and Health |access-date=20 January 2011 |author1=Peters-Michaud, Neil |author2=Katers, John |author3=Barry, Jim |work=Cascade Asset Management, LLC |publisher=Basel Action Network |url-status=dead |archive-url=https://web.archive.org/web/20110726012352/http://e-stewards.org/wp-content/uploads/2010/03/OccupationalRisksCRTGlassProcessing1.pdf |archive-date=26 July 2011}}</ref><ref>{{cite web |url=http://www.americanelements.com/cdm.html |title=Cadmium |access-date=13 April 2010 |publisher=[[American Elements]]}}</ref> The rear glass tube of modern CRTs may be made from [[lead glass|leaded glass]], which represent an environmental hazard if disposed of improperly.<ref>{{cite web |url=http://www.hinkleycenter.com/publications/lead_leachability_99-5.pdf |title=Characterization of Lead Leachability from Cathode Ray Tubes Using the Toxicity Characteristic Leaching Procedure |access-date=4 October 2009 |url-status=dead |archive-url=https://web.archive.org/web/20140222012228/http://www.hinkleycenter.com/publications/lead_leachability_99-5.pdf |archive-date=22 February 2014}}</ref> Since 1970, glass in the front panel (the viewable portion of the CRT) used strontium oxide rather than lead, though the rear of the CRT was still produced from leaded glass. Monochrome CRTs typically do not contain enough leaded glass to fail EPA TCLP tests. While the TCLP process grinds the glass into fine particles in order to expose them to weak acids to test for leachate, intact CRT glass does not leach (The lead is [[vitrified]], contained inside the glass itself, similar to [[Lead glass|leaded glass]] crystalware).