The following solutions were implemented in our plant to replace Alpha 
     110 due to long cure time.
     
     We heave used loctite peelable UV-but be careful, they change 
     formulations with notice only after discontinuing the original 
     formulation, and the new mask may not be an exact drop-in. Undercured 
     UV is very difficult to remove after wave soldering.
     
     We also use a peelable, ammonia free latex. This works well, and can 
     be oven accelerated to 20 minute cure, or 1 hour at room temperature. 
     It can be wave soldered as soon as it skims over.
     
     If you still are washing, we use a tape from Lost River products. This 
     works great, but most of our lines no longer have a cleaner.


______________________________ Reply Separator _________________________________
Subject: ASSY:  Peelable Soldermask for Wave Soldering Process
Author:  [log in to unmask] at internet
Date:    11/18/96 7:50 PM


ASSY: Clamps for Wave Solder Pallets
     
Daugherty, Dale @JOCY (@JOCY")
Thu, 14 Nov 1996 16:16:00 -0500
     
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From: "Daugherty, Dale @JOCY" <[log in to unmask]>
     
To: Internet - IPC TechNet <[log in to unmask]>
     
I am looking for information on peelable soldermask used prior to wave 
soldering.  We currently use Alpha 110 and must allow 3-4 hours drying 
time on thicker areas.
     
1) What peelable mask do you use and how much time must you allow for it 
to dry before you can run it through the wave?
     
2) Does anyone have experience with UV curable mask?
     
Dale Daugherty
[log in to unmask]
(423) 461-2228
     
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