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Re: [ARSCLIST] Acetate tape discolours tape box
Richard, I wouldn't say that they don't work with tape, it's more that
they are calibrated for film. I'm pretty sure that somebody from IPI is
on this list (Doug Nishimura?) so maybe they could chime in. The AD
strips just detect free acidity and they will detect free acidity in a
tape box just as well as they will in film or in a jar of pickles. What
makes them useful for film is the color change will tell you the point
at which the decay becomes autocatalytic so you can plan appropriately
and deal with the worst stuff first and ignore (or freeze or use
molecular sieves with) the films with mild symptoms.
It would be nice to know if the colors were meaningful for tape, but I'm
not sure what it would tell us. Film has big problems from the
relatively small amounts of shrinkage found in advanced VS but I've
never seen (smelled?) VS in tape that was bad enough to affect playback.
Richard L. Hess wrote:
I have used the A-D strips and have a package, but the general consensus
is that they do not work reliably on tapes. I don't recall all of the
details that others have observed and someday I will pursue this with
IPI, but their focus is film.