I disagree about the bioavailabilty. In a landfill, the lead glass is inevitably crushed into small particles the total surface area is therefore very large. As lead glass is slightly water soluble, the lead can enter into run-off over a matter of years. What happens to this water is the nux of the problem. I agree that the quantity of lead in a modern computer is small, but what about the zillions of CRT monitors still in use? Brian Thompson, David wrote: > Glen / Ingemar: CRTs do not contain layer of lead coating inside the > tube. The lead is contained in the glass and is not readily > bioavailable in a landfill environment. > > Today's computers probably do not contain 1/2 pound of lead. > Panasonic's current line up of laptops contain about 5 mg, a long way > from 1/2 pound. > > David Thompson > Panasonic > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Glen Herzog > Sent: Monday, December 11, 2006 10:15 AM > To: [log in to unmask] > Subject: Re: [TN] The 'poisonous'- computer reports > > Ingemar, possibly this article is suspicious because it was written in > 1996, long before LCD screens and long before the introduction of RoHS & > WEEE. CRTs have a heavy layer of lead in coating the inside of the > envelope. I'll bet that todays lead weight in a desktop would not > exceed > 1/2 pound. > > Table presented in: Microelectronics and Computer Technology Corporation > (MCC). 1996. Electronics Industry Environmental Roadmap. Austin, TX: > MCC. > > --------------------------------------------------- > Technet Mail List provided as a service by IPC using LISTSERV 1.8e > To unsubscribe, send a message to [log in to unmask] with following text > in > the BODY (NOT the subject field): SIGNOFF Technet > To temporarily halt or (re-start) delivery of Technet send e-mail to > [log in to unmask]: SET Technet NOMAIL or (MAIL) > To receive ONE mailing per day of all the posts: send e-mail to > [log in to unmask]: SET Technet Digest > Search the archives of previous posts at: > http://listserv.ipc.org/archives > Please visit IPC web site > http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional > information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 > ext.2815 > ----------------------------------------------------- > > --------------------------------------------------- > Technet Mail List provided as a service by IPC using LISTSERV 1.8e > To unsubscribe, send a message to [log in to unmask] with following text in > the BODY (NOT the subject field): SIGNOFF Technet > To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) > To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest > Search the archives of previous posts at: http://listserv.ipc.org/archives > Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 > ----------------------------------------------------- > --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------