Doesn't the ink already contain a high proportion of wetting agent in order to get through the fine nozzles etc? I think some sort of pretreatment of the pcb may be more effective. Richard P I don't know how you would do this, but... Most bubblejet ink is water soluable, adding soap to the ink will keep it from beading up. -Brad Woods -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads