There is an entire industry behind baking, dry-packing, and then long-term storage of components and PWBs and even mechanical parts for certain very-high reliability programs where they cannot afford obsoletion. These types of programs are typically called "legacy" systems because the part availability, condition, and use-readiness must be retained over a period of ten, fifteen, or twenty years or even longer. Examples are Space Shuttle program, ARES space stations, large medical instrument installations such as CAT-Scans, CT-Scans, etc., train controls, traffic control systems, building HVAC systems, long-use military tanks and ground vehicles, and certain avionics and planes, both military and commercial, and so on and so forth where the availability of replacement parts must be kept available. There are thus requirements for programs of this type, and the practice of buying COTS components, pre-testing both electrically and for solderability, etc, then decanting into smaller drypacks so small lot quantities can be removed from long-term storage, etc., is performed. Typically, for programs like this, a dry-pack is done, where smaller bags of drypacked parts are sealed inside of a larger drypack, and the entire kit of parts and boards is then kept in a drybox at 1% RH and in some cases, even stored at -40 C with nitrogen to preserve the parts and the solderability.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Robert Kondner
Sent: Tuesday, September 11, 2018 1:46 PM
To: [log in to unmask]
Subject: Re: [TN] Vendor Reel Parts Marking
Hi,
At several locations I have seen folks place thick stacks of PCBs in a plastic bad, even a moisture control bag, and then place that stack in a dry box.
It seems strange to me as would any boards inside the bag, or in the center of the stack get "Dried Out"?
Thanks,
Bob K.
-----Original Message-----
From: TechNet <[log in to unmask]> On Behalf Of David Hillman
Sent: Tuesday, September 11, 2018 2:06 PM
To: [log in to unmask]
Subject: Re: [TN] Vendor Reel Parts Marking
The tape and reel standard is EIA 481. I would suspect it contains the labeling criteria but don't know for certain.
Dave Hillman
Rockwell Collins
[log in to unmask]
On Tue, Sep 11, 2018 at 12:27 PM, Stadem, Richard D < [log in to unmask]> wrote:
> J-STD-033 has that information. We make our own "reel labels" for use
> when the reels are removed from their original (MSD-Labeled) packaging.
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of
> [log in to unmask]
> Sent: Tuesday, September 11, 2018 11:55 AM
> To: [log in to unmask]
> Subject: [TN] Vendor Reel Parts Marking
>
> Fellow TechNetters:
>
> Is there an IPC STD and/or Industry Bench mark that address how the
> vendor reel part container should be label. Also the reel itself in the
> event that the same parts is offered in a variety of gold plating
> thicknesses.
>
> Victor,
>
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