On Wed, 25 Sep 1996 16:20:46 +0000 george <[log in to unmask]> writes: > >Doug >Perhaps I've been around too long, but, with a smile, I can remember >..... > >One part isopropol, one part water, one part Lemon Joy makes a fine IR >reflow flux >also. (adjust pH to 1-2 with HCl). Black Jack Molasses used to be >The copper >brightner of choice. Spray cans of "Static Gaurd" can help keep the >static charge >down in the printing exposure frame. Chrome plate likes uric acid as >a brightner. >I won't go into how they figured that out. Toothpastes containing >diatomaceous >earth do OK as a polish on micro-sections. Certian Shampoos will work >as anti-pit >agents in the Nickel plater. Autobody epoxy works as a quick cross >section mount. >Never tried Tarn-X as a flux, but it does work as a solder brightner, >and helped at >the old reflective AOI machines to quickly get the copper bright. >Pencils and a >cotton ball work as a brush gold plating anode. There was something >disgusting >which once was used in Tin-Lead/HBF3 platers before peptone... > >Walmart can supply some PWB product needs, and you get wat you pay >for. Just >because there are suppliers who charge big bucks for supplies doesn't >mean there >isn't other stuff out there that works, at least 60% as well. >Sometimes 60% is >good enough. The problem is, you gotta know when 60% isn't good >enough. > > >By the way, just what surface insulation resistance would one get on a >board which >was washed in Cascade after hot air solder level? I've understood it >had been >tested and found it "passed" the "Omegameter" test. Does that mean >better than >60%? > >In search of better uses for Tobasco, >George Franck > > >Darn, there is a great mold release (non-silicone) for the lamination >press pins >and plates, and I can't remember it. > George, You may be thinking of PAM Spray? Sorry I just couldn't resist..... Scott *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************