I was just referring to the foam Althor sells.

Peggy
                     Visit my website at http://www.shelltrips.com
                                  Peggy Williams
                                   Shell Elegant
                                    PO Box 575
                                Tallevast FL 34270
                                   (941) 355-2291
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>> I prefer the blue foam inserts. The black ones feel like they will
>> deteriorate and the little holes in the foam are larger.
>>
>
> The color of the foam is not necessarily a good indicator of whether it is
> archival or not.  I purchased a shell several years ago, and it arrived in
> a plastic box with blue foam.  I pulled it out of my collection several
> years later and the foam which had been soft was now beginning to
> deteriorate.  After this incident, I removed all foam liners in boxes that
> I had received with purchases, trades, etc. and replaced them with cotton,
> polyester foam or polyethylene foam.  These were acid free and archival and
> now I sleep easier :-)
>
> Moral of the story, practice safe foam, don't trust your partner, protect
> yourself...use products that you know are safe, and protect your collection.
>
> Charlie