From: Mike Barmuta <[log in to unmask]> Date: Wed, 28 Jan 1998 08:35:21 pst Subject: Re: [TN] Serial # on PCB Washing off in rinse To: Ferrell-2 Bobby <[log in to unmask]> Cc: [log in to unmask] Bob: Instead of trying to overcoat the serial # which adds another level of operation to the process, find a better stamping ink. There are a couple that we have used with good results over many years.They are processed thru a variety of assembly flux/solder/clean operations. These include aqueuos and rosin fluxes, IR and VP reflow, flowsolder and cleaning using high pH saponified aqueous and aliphatic hydrocarbon chemistries. Contact: VRS Marking, Mountain View Ca. 415-967-5458 AREO 1250 White Willard Marking Corp, Santa Ana Ca. 714-751-0690 Willmark #44 Black Regards Michael Barmuta Staff Engineer Fluke Electronics Everett Wa. 425-356-6076 On Wed, 28 Jan 1998 05:22:38 -0800 Ferrell-2 Bobby wrote: > From: Ferrell-2 Bobby <[log in to unmask]> > Date: Wed, 28 Jan 1998 05:22:38 -0800 > Subject: [TN] Serial # on PCB Washing off in rinse > To: [log in to unmask] > > Hello Technetters, > Any suggestions on the following problem would be greatly appreicated. > > We are manufacturing/assembling small amounts of custom boards in house > and are having a > problem with the ink stamped serial numbers on the board. We have tried > several different types of coatings (epoxies, varnishes, etc.) to try > and protect the ink stampings from coming off. The > difficulty that we are having now is that during a cleaning bath in 200 > proof alchol the epoxy is > peeling off. > > Does anybody out there have any suggestions as to what to use to protect > the ink stampings. > > TIA, > > > Bob Ferrell > NASA > MM-G1/G3 > Kennedy Space Center, FL. 32899 > 407-867-6678 > > > > > ################################################################ > 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 web site (http://jefry.ipc.org/forum.htm) for additional information. > For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 > ################################################################ > ################################################################ 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 web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################