We take masking off after the coating has come to a tack free state, but before cure. That way we can touch up any coating that comes up prior to cure. I suspect that the coating is getting under the spray fixtures and the cured coating adheres it in place. Doug Pauls Jeff Smith <jeffs@PENTAGON-E MS.COM> To Sent by: TechNet [log in to unmask] <[log in to unmask]> cc Subject 03/08/2007 02:10 [TN] CC fixture issue PM Please respond to TechNet E-Mail Forum <[log in to unmask]> ; Please respond to Jeff Smith <jeffs@PENTAGON-E MS.COM> We have a customer using a masking fixture for their conformal coating process. They're running into an issue with the cover adhering to the board after curing. The fixture is made from 6061 Aluminum, and the coatings being used are: Arathane 5750 A/B with a Cellosolve acetate Thinner Aptek 2512 Humiseal 1B31 with Humiseal 521 Thinner We make thousands of these fixtures a year and haven't run into this problem. We're exploring possible solutions, so I thought I'd post a couple of questions: 1) Does the board need to remain in the fixture until fully cured? 2) is there an issue with these specific coatings? Thanks! Jeff Smith [log in to unmask] --------------------------------------------------- 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 -----------------------------------------------------