Thomas, Try a cleaning solution of 5 g/l of Thiourea in 5% sulphuric. Or some manufacturers provide a solder cleaner. Lk On Wed, 8 Jul 1998, Thomas Jacob wrote: > Hi Technetters > > We have a full rack of rigid polyimide boards with pale, oxidized > surface onto the HASL-solder pads. > How can we remove the oxide layer whithout scrapping the boards? > Is there an economical way to run thru a cleaning machine? > I don't want to heat up the boards to reflow the solder... > > Your help will be highly appreciated > > Thomas Jacob > > Phone: 0041-1-306 24 07 (direct) > Fax: 0041-1-306 36 40 > e-mail: [log in to unmask] > Internet: http://www.dyconex.com > > DYCONEX LTD. > Unterwerkstrasse 3 > CH-8052 Zurich > Switzerland > > ################################################################ > TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c > ################################################################ > To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: > To subscribe: SUBSCRIBE TechNet <your full name> > To unsubscribe: SIGNOFF TechNet > ################################################################ > Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. > For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 > ################################################################ > > ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################