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…
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