Perhaps I should have prefaced Question 1 with INCOMING!!!!!! A commenter has indicated that we should have a section discussing possible contamination or process residues that come from "Processing Aids" in board fabrication operations. We already discuss items like sharpees, grease pencils, tapes, stickers, etc. What other "process aids" should be included in a primer on board cleanliness for fabricators and why? One of the commenters for this was Dewey, and the IPC Dewey filter automatically routes those to a black hole....... Doug Pauls ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________