We currently use MacDermid 9490 peelable mask for selective plating and/or
selective HASL with good results.  The only real trick to using it is the
cure time and temp.  They must be followed exactly or the mask will either
cure permanently or peel off the board prematurely.

It sounds like you may be trying to find a peelable mask you can leave on
product to be sent to the customer.  That's probably not a good idea with
the MacDermid.  As a general rule of thumb, we process the boards so that
the peelable mask will be removed within 12 hours of application.

Hope this helps.

Russ Bafford
Junior Process Engineer
Sovereign Circuits
----- Original Message -----
From: "Michael Lester" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, August 21, 2000 2:41 PM
Subject: [TN] Peelable SolderMask


> Any manufacturers in here have experience with peelable mask? Only the
good
> points are ever discussed in the sales brochures. I'm looking for the evil
> side. It seems to go against everything I've ever tried to accomplish with
a
> solder mask and it makes me a little nuts to think a customer wants to
undo
> what we try so hard to do! I'm afraid next they'll want removable
> traces.....Any thoughts or comments appreciated.
>
> ##############################################################
> TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
> ##############################################################
> To subscribe/unsubscribe, send a message to [log in to unmask] with
following text in
> the body:
> To subscribe:   SUBSCRIBE TECHNET <your full name>
> To unsubscribe:   SIGNOFF TECHNET
> ##############################################################
> Please visit IPC web site (http://www.ipc.org/html/forum.htm) for
additional
> information.
> If you need assistance - contact Keach Sasamori at [log in to unmask] or
> 847-509-9700 ext.5315
> ##############################################################

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Keach Sasamori at [log in to unmask] or
847-509-9700 ext.5315
##############################################################