The concern would be that some masks have a very fine powder filler. This
might raise some concerns, for example it could accumulate in closed loop
systems.

Kind Regards

Mike Fenner

Applications Engineer, European Operations
Indium Corporation
 T: + 44 1908 580 400
M: + 44 7810 526 317
 F: + 44 1908 580 411
 E: [log in to unmask]
W: www.indium.com
Leadfree: www.Pb-Free.com



-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Frank L Norman
Sent: Friday, January 25, 2002 3:28 PM
To: [log in to unmask]
Subject: Re: [TN] Water soluble solder mask


Steve,

The batch washer is just like your dishwasher at home. It washes with a
saponifier for 9 minutes then preforms about 10 rinse cycles(resistivity
monitored), draining and filling with fresh DI water each time.

Frank Norman
Raytheon
[log in to unmask]
805-879-2745




                    SteveZeva@AOL
                    .COM                 To:     [log in to unmask]
                    Sent by:             cc:
                    TechNet              Subject:     Re: [TN] Water soluble
solder mask
                    <[log in to unmask]
                    ORG>


                    01/24/02
                    06:44 PM
                    Please
                    respond to
                    "TechNet
                    E-Mail
                    Forum.";
                    Please
                    respond to
                    SteveZeva






Hi Frank!

Question: Are you closed-loop with your water?

-Steve Gregory-


 Hi all,

 Looking for insight about using water soluble solder mask.

 We are currently using a latex solder mask made by Litton. But now the
 question as been asked if water soluble mask could be used instead. Note,
 batch washer(Aqueous Tech. Washer) is used to clean PWAs.

 Frank Norman
 Raytheon

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