We are experiencing de-wetting upon application. We are using a PVA coater
and using the same ratio, 1 to 1. The problem is that it is interment within
the same lot making it difficult to pin down. 
Samples of bare boards as well as boards that coated fine and ones that
coated poorly have been sent out to a lab for eval. 

Ted

-----Original Message-----
From: Tom P. Hummel [mailto:[log in to unmask]] 
Sent: Thursday, February 05, 2009 2:45 PM
To: TechNet E-Mail Forum; Ted Tontis
Subject: RE: [TN] Coating material

We currently use HumiSeal 1B73AP thinned 1 to 1 with 521 in our PVA
machine and have not had any issues.  Are you experiencing problems?
What type of automated machine are you using?


Thomas P. Hummel
Carlton Industries Corp
[log in to unmask]

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