Eric, I am still hunting for good net sites for your first request. With regards to the latter: No, bismuth is not more toxic. Bismuth oxychloride is used in the cosmetics industry and other bismuth salts (I forget which one(s)) are used in PeptoBismol® (Did I spell that right?) No bismuth compounds are listed in the 1990 "NIOSH Pocket Guide to Chemical Hazards" I have and only bismuth telluride is listed in the ACGIH TLV Booklet - because of the tellurium. Toxicity does come into play in its mining, though, as 10 to 40% (depends on who you talk to and/or whether you are talking world-wide or country specific) comes as a by-product of lead mining. regards, Bev Christian Research in Motion -----Original Message----- From: Eric Christison [mailto:[log in to unmask]] Sent: December 7, 2001 11:36 AM To: [log in to unmask] Subject: [TN] Info on lead free reflow profiles sought After half an hour's fruitless searching of the net I thought of Technet. Can anyone out there point me at a web page or email me a reflow profile for one of the higher melting point lead free solders. I'm trying to produce a test spec to determine whether some temperature sensitive components would survive a 'worst case' reflow cycle. By the way. I note that many of the lead free alloys contain Bismuth. Isn't this more toxic than lead? Am I being naive in my surprise that one toxic chemical is being replaced with something equally bad? Regards, ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------