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Re: Acid-free materials sold in stores



Barbara,

Is the adhesive on the emulsion side or the support side? If the adhesive is
on the emulsion side, it may be a form of deterioration of the negative. In
our historical collections (up to 1950), we have some negatives that, over
time & several drastic temp. & humidity fluxuations have become tacky
because of the gelatin adhesive softening/hardening/softening/etc. and
ending up looking like "dried molasses". Some have stuck to each other, some
have stuck to paper, and some just look generally icky. :)