Brian....you are insightful.... I am a chemist, but not a polymer chemist, and will, as usual, put my opinion down, with the caveat that free advice is often not worth what you paid for it... First it is not clear that you want/need a polymer chemist, because it is only incidental that the Brominated Phenol is in a polymer...what you are concerned about is the presence of free Br- and this will/would happen whether or not the Brominated Phenol is part of a polymer. My understanding is that the Br-Phenol bond is reasonably, but not perfectly strong, and it is almost certain that the more Br- you have on the Phenol, the less stable each bond becomes, and since there are 5 sites that a Br could bond to, and we are using 4 of them, my suspicion is that the last one is reasonably weak. The test it self could free some of the Br-, also, baking, especially in the presence of moisture could also likely free up the Br-. The situation is actually pretty easy to sort out, as free Br- is very easily water soluble, so, someone with an ion chromatograph could simple wash laminate with deionized water at various points in the process, and report what they discover. (Why do I feel that the results on this will vary widely, not only from one laminator to another, but from one batch of resin to another?) Anybody with an IC, and some free time? Rudy Sedlak RD Chemical Company --------------------------------------------------------------------------------- Technet Mail List provided as a free 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------