Hi Ian it depends when you do that testing. Tests right after soldermask shoud have values around 0.5-0.8 up to values < 2 (dry film soldermask). It also depends whether you heat up the solution or not; the american folks mostly have the heater applied while we are measuring @ room temperature because of security reasons. hope that helps ulrich Ian Boyton <[log in to unmask]> on 08.07.99 17:53:16 Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond to Ian Boyton <[log in to unmask]> To: [log in to unmask] cc: (bcc: Ulrich Zimmer/Multek/DIIG) Subject: [TN] Ionic testing for contamination Hi all Can anyone tell me what the industry std/limit is for micro grammes of NaCl per sq cm found after ionic testing? I have a value under 5 and have a set fail limit of 20ug. This is after a 20 min test. Best Regards Ian Boyton ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com