From:	NAME: WILLIAM G KENYON              
	FUNC: Chemicals/Electronics           
	TEL: 302-652-4272                     <KENYONWG AT A1 AT ESVAX>
To:	NAME: [log in to unmask] <"[log in to unmask]"@ESDS01@MRGATE@ESVAX>

It is my understanding that NaCl is liberated during the coupling 
reactions needed to make the high molecular weight laminate 
resin.  If the boards were stored in a humid environment, or one 
that experienced changes in humidity, it is possible that the 
residual NaCl could migrate to the surface.  The first thing to 
do however, might be to calibrate both your ionic tester and that 
of the PWB suppliers, with the same NaCl solut to see if the two 
instruments are giving the same readings.  Then try 0.5 and 2x 
the calibration levels as unknowns to see what the response of 
the instruments comes out to be. It would be a real bummer to do 
a lot of detective work just to find out the instruments were not 
giving the same numbers.

***************************************************************************
* 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.        *
***************************************************************************