*- DORIS FANG -* wrote:
> It's the process. Kodachromes do not stand up well to being projected.
> One should keep the times for each projection below 10 seconds.
> E-processed slides OTOH, can survive projection much better.
Wilhelm came to this conclusion when he published his book on color
longevity some years ago. I think he claimed that Kodachrome showed the
first signs of color degradation after about 1 hour of projection, and I
think it didn't matter if it was an hour-long "exposure" or sixty
one-minute showings. His main point was that Kodachrome has exceptional
stability in dark storage. . . .something like 100 years or more. He
suggested getting Fujichrome dupes made, which held up much better under
projection.
The dyes added to the different layers in K-14 are derived from the same
pigments used in automotive paint . . . .pretty tough stuff.
Morgan Sparks
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