Sorry to bust in with a "real" question.... Has anyone experience with using the black oxide replacement chemistry as a pre-clean for dry film soldermask? The mask is Dupont Vacryl(sp?). The chemistries are usually refered to as alternative etch or differential etch as generic terms. Vendors offer Cobrabond and Bondfilm and Multibond as process names. I have experience using these chemistries with Liquid photoimagable soldermasks, but the dry stuff is not in my toolkit. Thanks in advance, Russ --------------------------------------------------- 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 -----------------------------------------------------