"NOTE: The information in this e-mail is confidential and may be legally privileged. If you are not the intended recipient please notify the sender immediately and then delete  this  e-mail. You must not read, copy, use or disseminate this e-mail or any  information in it .  Although this e-mail and any attachments are believed to be free of any virus or other defects which might affect any computer or IT system into which they are received, no responsibility is accepted by Laporte plc or any of its associated companies for any loss or damage arising in any way from the receipt or use thereof. Any opinions expressed in this e-mail or any attachments are those of the individual sender and not necessarily the Company."
"

Cara,

Dave is correct. Colin Lea published a series of papers on the subject of
blowholes.
Part 1, Part II, Part III -     Vol. 12 No.  4, 1986
Part 4, Part IV, Part VI-   Vol. 13, No. 4, 1986

Circuit World- MCB UP Limited

Phone:  44-1274 777700
Fax:    44-1274 785200

Best regards,

Mike Carano


        -----Original Message-----
        From:   David Hillman [SMTP:[log in to unmask]]
        Sent:   Wednesday, August 09, 2000 2:21 PM
        To:     [log in to unmask]
        Subject:        Re: [TN] Blow Holes

        Hi Cara! Take a look at Klein Wassink's book (ISBN 0-901150-14-2) ,
chaper
        8.1.3 and the reference papers in that section for information on
the cause
        for blowholes. I can't find my references but I believe Colin Lea
did a
        multi-article spread on the physics of blowholing in Circuit World
        magazine. Good Luck.

        Dave Hillman
        Rockwell Collins
        [log in to unmask]




        "Cara.Startek" <[log in to unmask]>@IPC.ORG> on 08/09/2000
01:52:17 PM

        Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please
respond
              to "Cara.Startek" <[log in to unmask]>

        Sent by:  TechNet <[log in to unmask]>


        To:   [log in to unmask]
        cc:

        Subject:  [TN] Blow Holes


        I'm having a problem with blow holes occurring in a thick board that
I'm
        running on a wave solder machine.  As a test I am going to bake the
boards
        for 24hrs to remove moisture from the board and eliminate this as a
cause
        of
        the problem.  Is there any thing else that cold be causing blow
holes?

        Cara Startek

        Process Engineering
        http://www.leitch.com

        ##############################################################
        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
##############################################################