I've seen some tape, I think it's 3M (Scotch) from late in the time of
acetate-base, that's pretty dark, reddish brown.
At 09:19 AM 5/3/2004 -0500, you wrote:
>Currently I'm surveying the condition of a collection of reel tapes that are
>almost entirely backed with cellulose acetate. Usually it's obvious, because
>the acetate tapes practically glow when held up to the light. But
>I'm finding a tape that is just barely translucent - if I move my finger
>the tape pack, I can see a shadow, but I have to look hard.
>Is there another formulation for acetate tape that isn't nearly as
>Because the others are so obvious, I would have marked this kind down as
>polyester or PVC, except that one of them seemed to have a slight vinegar
>Preservation and Conservation Studies
>School of Information
>University of Texas at Austin
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