At 09:36 AM 10/1/97 E, you wrote:
>Regarding Plastic Parts:
>
>
>When a part is identified as having an allowable exposure time of 48 hrs...
>
>1) Can I expose it for 24 hours, seal it in a moisture barrier bag for some
>extended period of time, and then expose it for another 24 hours?  In other
>words, is it safe to assume that this is CUMULATIVE exposure time?

According to IPC, yes it is cumulative (IPC-SM-786)
>
>
>
>
>2) If you open a bag just to pull a couple of parts, and then reseal the bag
>(minutes of exposure) does that present any problems?

If it is open for less than 30 min., it does not present a problem (IPC again)
>
>
>
>
>For those who respond, please clarify whether this is your internal
>procedure, or if it is documented in IPC, or elsewhere.
>
>
>
>Thanks,
>
>Mike
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>
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------------------------------
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