There are second generation glass negatives, but most are original and all are necessarily old. Glass as the material was replaced by plastic film about 1930s, which obviously means negatives (and photographic slides) made of glass are antique. Obviously originals are the most desirable, but glass negatives and slides are a safe buying bet because you know at the least they are antique.
Last edited by drcy; 09-29-2015 at 10:12 PM.
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