Srs.
     You can see the IPC-SM-786-A standard (Dry pack ware) or if you speack
     german... DIN TM3P49-005/01,
     Boths are similars, and make reference to "Dry pack scale":
     scale     Description
       1       Not sensitive
       2       Sensitive limited
       3       Sensitive
       4 & 5   Very sensitive
       6       Dry before use

     Also has referencences about Bags (MIL.std-81075), desecants
     (MIL-D-3463) and labels (IPC-788-005).

     see you techneters.
     Francisco Briceno
     Molex de Mexico



______________________________ Reply Separator _________________________________
Subject: [TN] Storage conditions of pcb
Author:  Ian Parker <[log in to unmask]> at INTERNET
Date:    4/21/98 5:10 PM


Good Day!

Could anyone advise me on the specification to adopt ( temperature and
relative humidity ) for the optimium storage conditions for bare printed
circuit boards.

These boards are typically overmakes which we store until our Customers
can place their next order.

What length of time do you think the solderability of solder levelled
boards would remain excellent in these conditions.

Best regards

Ian Parker
Prestwick Circuits
Scotland

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