In truth, it is my understanding that the flux was changed because nobody uses pure rosin flux anymore. They only reason the flux makers produced it was for solderability testing. The new flux specification was supposed to reflect real world performance requirements. We are using an L0 flux. But, I am sure it performs much better, in the real world than the material specified in previous revision of the standard; False calls. Though, I suspect that someone using pure rosin flux could have issues with components that pass the current tests. Dave? -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Dennis Fritz Sent: Wednesday, October 31, 2007 2:32 PM To: [log in to unmask] Subject: Re: [TN] Flux Guys, I am vice chairman of the 5-23b committee on solderability with Dave Hillman as the chairman. I do not officially remember why this was changed, but it was for a reason - not willy-nilly. My suggestions are either: 1. Because of some change in the J-004 standard on flux, or 2. The changed flux reduced the chance of false calls in the test. I have a reinforcing note to Dave Hillman to get you an answer. And, please review the information still carried on the committee web site: _http://members.ipc.org/commReg/CommRegFile.asp?PDFTYPE=min&ComName=Componen t% 20and%20Wire%20Solderability%20Specification%20T.G&comm=5-23B_ (http://members.ipc.org/commReg/CommRegFile.asp?PDFTYPE=min&ComName=Componen t%20and%20Wire%20 Solderability%20Specification%20T.G&comm=5-23B) From a quick scan, I don't see where this change is called out in the minutes. Again, you can review most any of the IPC committtee work, by going as follows: 1. IPC Web page 2. Standards (that is under the Knowledge header) 3. Standards Development 4. Committee Home pages 5. Then, you have to be somewhat familiar with the IPC committee structure to know where to search. Assembly standards tend to all be under committee 5-20 Assembly and Joining. J-002 is under Committee 5-23B. 6. Try it and you will like it (Dr. Suess). Denny Fritz MacDermid, Inc. In a message dated 10/31/2007 1:32:03 P.M. Eastern Daylight Time, [log in to unmask] writes: New consensus . . . Who sits on these committees? -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Sue Powers-Hartman Sent: Wednesday, October 31, 2007 12:36 PM To: [log in to unmask] Subject: [TN] Flux The new JStd-002B 3.2.2 states that ROL1 flux shall be used for solderability testing, while the old Rev JStd-002A 3.2.2 calls out ROL0 Flux. Does anyone know why this was changed? ************************************** See what's new at http://www.aol.com --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 15.0 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 -----------------------------------------------------