Hi Inge: Humidity may contribute to the problem, but I would look at the coating material. Is it past due? Is it too viscous? Are they stored to skin in a very cold place prior to place in the oven? Try another batch of humiseal and check if they are processed the same way as always, not leaving them too long in a cold place. Regards, Ramon -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Ingemar Hernefjord Sent: Thursday, October 27, 2005 10:32 AM To: [log in to unmask] Subject: [TN] Urgent! Acrylic coating Hi all, I got a call from our production. They stopped the board coating. All boards get white and superthin veils, patterned like fractals or roses. I'm at home because of illness, so I can't participate in their work with the problem. I asked them for how long they bake the board before spraying, and they told me that no baking is made at all. Does sound wrong to me. My first theory is humidity in some form. Humiseal, don't have the article number just now. Anyone who has a tip? I'll get pics sooner, maybe I can resize them for Steve's gallery. Thanks in advance Ingemar Hernefjord Ericsson Microwave Systems --------------------------------------------------- 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 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- 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 847-615-7100 ext.2815 -----------------------------------------------------