In a message dated 8/29/2007 2:23:11 A.M. Eastern Daylight Time, [log in to unmask] writes: Hi Leo, I have some data about hydrolysis for a glassfiber reinforced PWB type that is similar to FR-4. Two diagrams on tensile modulus and tensile strength vs. immersion in stem and water vs time up to 1,000 hs. Can send offline if you are interested. Inge I have the same interest - physical properties of laminate with changes in humidity. My interest is in vibration performance of military boards, and we have determined that laminate stiffness definitely plays a role. However, we would also like to know if "wet - Somalia" versus "dry - Saudi Arabia" locations also affects vibration performance. Thanks in advanced. Dennis Fritz SAIC, Inc (Crane Naval Weapons Depot - Indiana). ************************************** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour --------------------------------------------------- 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 -----------------------------------------------------