Tom, what you describe is the theory. I have heard rumours that was not 
the case in Opelika. Cases were filled with reels when needed. I suspect 
that bulk packs were perhaps a bit more likely to be all the same batch.

How wide were the jumbos in Opelika?



On 12/17/2015 9:27 PM, Tom Fine wrote:
> I thought the numbers on the box and on the stickers box indicated batch
> numbers and dates of manufacture, indicating that all pancakes in the
> box were from that batch and date. At least that's how I always
> understood 3M and Ampex boxes.
> -- Tom Fine
> ----- Original Message ----- From: "Lou Judson" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Thursday, December 17, 2015 7:54 PM
> Subject: Re: [ARSCLIST] Interesting sticky-shed data point
> Tom, is it a documented fact that all (12) rolls (reels or pancakes) of
> tape in a box would be from the same manufacturing/slurry batch? I never
> looked, but it would not surprise me if there were different
> manufacturing runs on the same delivery carton…
> <L>
> Lou Judson
> Intuitive Audio
> 415-883-2689
> On Dec 17, 2015, at 4:38 PM, Tom Fine <[log in to unmask]> wrote:
>> Hi Marie:
>> This is very strange:
>>> I have also had reels of Ampex 456 come out of the same box of 10 or
>>> 20 and
>>> purchased at the same time where 1/2 have SSS and the rest are fine!
>> I've never heard of that from anyone else. That would almost seem to
>> defy all theories of what causes sticky-shed, because one would assume
>> by a "box" of tapes you mean a real-deal Ampex case with a batch
>> number on it. If that's so, it's really freaky that some tapes in the
>> same batch (which I think means the same production run of the
>> chemical slurry) would get sticky-shed and others wouldn't.
>> I'm not doubting your testimony at all, just saying that is calls into
>> question what is believed to be the cause of sticky-shed, in that I
>> can't see how the binder chemistry could differ within a batch.
Richard L. Hess                   email: [log in to unmask]
Aurora, Ontario, Canada                             647 479 2800
Quality tape transfers -- even from hard-to-play tapes.