3D Film longevity questions (somewhat different)

[P3D Michael Kersenbrock <michaelk@xxxxxxxxxxx>]

Greetings,

        This longevity subject has been talked about quite a bit with
the "results" being:

        Kodachrome - best for long term non-heavily-projected use
        Fuji E6's (and maybe Kodak's E6) - best for heavy projected use


My question has to do with the longevity when using print-film.  Kodak
Ultra Gold 100 in particular (if I remember the name right).

I took wedding photos using that film (in a FED camera) and had it 
"copied" into positive images on film (talk about wedding photos
recently is what prompted my question).

So, the questions are:

        1) Any idea how long the slides I'm giving to the couple will
           last?  Is it something odd which will fade in a year?  The 
           uncut-roll negative-to-slide conversion was done by Dale.

        2) Any idea how long the Kodak negatives will last?  I presume that
           some fading can be corrected when recopied to slides again, but
           how long can the film be held and still yield good results?

Just curious about the day when they come back to me and ask about their
faded 3D wedding slides (when will it happen, and what do I say).


Mike K.


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