Tom- some questions: 1. Does your aqueous cleaning include saponifier? If so, saponifier will often craze moulded plastics, especially if they are not extensively stress relieved. A major manufacturer wanted to exit solvents over the worry of plastics crazing, so put in aqueous saponifier and the crazing was much, much worse. 2. Have the suppliers of the cleaning system, parts supplier or plastics maker offered any temperature exposure data vs parts survival in their public literature or under direct questioning? If any of the above are a possible source of your problem, you could make adjustments based on the information supplied. If you are just doomed re this tack, and your customers require clean products, then you may wish to implement cleaning with a mild, lower boiling point cleaning system. An in-line system would allow continuous output of product without the off-line baking step and attendant handling required in your present system. Bill Kenyon Global Centre Consulting 3336 Birmingham Drive Fort Collins, CO 80526 Tel: 970.207.9586 Cell: 302.377.4272 [contact me off-line if you have other questions etc. re this problem] --------------------------------------------------- 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 847-509-9700 ext.5315 -----------------------------------------------------