I found the html page I saved from Fuji's web site, and have pasted the main
text below.
Simon E.
March, '95. The Difference Between Professional and Amateur Fujichrome
Reversal (Slide) Films.
There are some differences between the two product lines.
1.The emulsions are basically the same. However, professional chrome film
has a slightly higher base density that makes for better scanner
separations. The whites are more consistent from a scanned professional
chrome. The slightly higher base density also makes for more detail in the
brightest areas. It should be stressed that this difference is minimal but
it does exist. Likewise, amateur film has a slightly lower base density for
crisper looking images when projected.
2. The slightly higher base density has another advantage. It makes the film
less susceptible to fogging. This fogging or can occur, for example, when
film is loaded in bright sunlight. With professional film the fogging will
be minimized if it occurs at all.
3. Professional film is kept under controlled (below 15 Degrees C)
conditions. Photographic emulsion is subject to change after the
manufacturing process. Three variables that can affect and in the end
deteriorate the emulsion are time, temperature and humidity. Fuji Film is
packaged such that humidity is not a factor. Time and temperature are the
main factors that cause emulsion or film to change. We can control the
temperature variable by keeping the film cool. This is very important since
lower temperatures slow the aging process. Time is the only variable that
can't be controlled through any other means other than shooting and
processing the film.
4. Since the time, temperature, and humidity affect all emulsions, it would
be better if amateur film as well as professional film, was kept cool.
However, it is not practical due to cost to keep all film in a controlled,
cool environment.
Fujichrome emulsions' initial aging is excellent so no ripening is needed.
Fuji Film's tight control on quality eliminates the need to select one
emulsion over another for purposes of labeling it as a professional product
vs. an amateur product.
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