Hi Phil - I know that some folks think its a hassle to reseal  the bag 
after removing a portion of a board group but I think it is a simple and 
somewhat effective manner to deter water absorption by the remaining 
boards. The optimum situation would be to reseal in a moisture proof bag 
that inhibits interaction between the boards and air but even sealing up 
any bag with a desiccant pack is a reasonable measure to create an storage 
"envelope" that becomes static. The IPC-1601 document has some good 
information that will be useful for your inquiry.

Dave Hillman
Rockwell Collins
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[TN] board baking - thread continuation






Ok, you folks have been very helpful so far.  Now I need to pump you for a 
little more information, but let me set the stage a little.

We typically build boards in small batches (25 to 50 boards at a time) but 
we may buy bare boards in a larger quantity.  Historically we would slice 
(or rip) open the sealed board package and remove the number needed for 
the kit.  The remainder would sit in the parts bin in the stockroom with 
no special handling.  Being in New England, summertime can get pretty 
humid.  I maintain that we should seal the boards for the kit (build here 
or ship to a CM) and the leftover boards in a bag or pouch with a 
desiccant.  I did order IPC-1601 back in August, but it hasn't made it up 
to my office yet.

To properly store the boards is there a preferred plastic bag and 
desiccant I should use?  I'm going to assume your basic grocery store 
"Zip-lock" type bag is NOT the product to use.  I would think there are 
bags and desiccant that are specifically for this application.

Thanks in advance,

Phil Nutting
Design for Manufacturing Engineer
Kaiser Systems, Inc.
126 Sohier Road
Beverly, MA 01915
Phone: 978-922-9300 x1310
Fax: 978-922-8374
e-mail: [log in to unmask]<mailto:[log in to unmask]>
www.kaisersystems.com<http://www.kaisersystems.com>
www.linkedin.com/in/philnutting<http://www.linkedin.com/in/philnutting>


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