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[filmscanners] Re: Nikon LS4000 Depth of field

dickbo discounts the problems of glass mounted slides deteriorating:

> I have several carosel's here which contain glass mounted Kodachromes at
> least 30 years old and nothing has happened yet. The worst that cane be said
> is that every now and again it is necessary to re seat them in order to
> remove newton rings.

But there's a logical flaw in saying "I never saw it, so it doesn't exist".
Storage conditions -- temperature, humidity, presence of fungal spores -- will
have an influence. I have seen enough mouldy glass mounted slides to take this
issue seriously (I live in the sub-tropical zone). As to out-gassing, I would
keep an ear open to what the conservators say.

Peter Marquis-Kyle

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