The over the counter variety is probably only single distilled if distilled at all. Laboratory water is triple distilled. Sounds like you are really buying DI water instead of distilled. Sometimes the bottle says something like "For all distilled water uses" meaning it is a substitute.
There are simple DI cartridges that can be coupled to your tap. They are cheap. Simple softeners do not remove the light metals. Be sure to get what is called a double ion exchange resin. I think I got mine from Vanwaters Rogers. BTW do you bake your PCBs after you wash them? Fred Townsend "Syd Levine (AnaLog)" wrote: > I discoverd my problem, I think. I have been trying to use grocery store > (Wal-Mart) distilled water to wash these dern PCBs. At 150C, the ionic > residue is causing trouble. Where can I find good DI water in bottles? I > hate to invest in a machine when I need maybe a gallon or two per week. I > suspect I need water that is close to the chip making standards (18 > megohm/cm). > > Syd H. Levine > AnaLog Services, Inc. > Phone: 270-276-5671 > Telefax: 270-276-5588 > E-mail: [EMAIL PROTECTED] > URL: www.logwell.com > > -- > Author: Syd Levine \(AnaLog\) > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB CHIPDIR-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). -- Author: Fred Townsend INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
