I would suggest the Hysol 50-000 series Cat-L-inks, two part heat curable epoxies for screen printing (although we also stamp and hand letter). Suggest the 45 or 77 catalysts. For surface pre-treatment we allow light abrading but usually just an acetone or IPA cleaning is sufficient (just prior to ink application, then dry then apply ink). ______________________________ Reply Separator _________________________________ Subject: ASSY : Marking On Nickel/Gold Author: [log in to unmask] at esdigate Date: 5/10/96 4:19 AM Item Subject: cc:Mail Text I need to implement ink marking on nickel and gold surfaces for IC components. Can anyone advise me on, a. Type of ink (for pad-mark) b. Surface pre-treatment process that would ensure that the ink would meet the MIL-std mark permanancy test requirements ? Appreciate your expert advise ! Thanks Jeff-MH Tan Snr Process Engineer [log in to unmask]