Bob Larter wrote:
You can't tweak the colour response of film, you can with CRTs or LCDs.

People have been known to do it with Ektachrome type film (Ektachrome,
Fijuchrome, AgfaChrome, Ilfochrome, etc) with varying success by tweaking
the exposure and development.

At one time you could get Kodachrome developed to spec, which was
intended to correct for mistakes in exposure, but it certainly would
change color response.

In the printing process, either to film (used in movies) or paper, you
could do all sorts of things.

Standard C-41 color film has an exposure latitude of less than one stop
underexposure, but 4-5 stops of overexposure. As the exposure increases,
color response, contrast and graniness change. If you like fine grained over
saturated colors, try shooting a roll of ISO 100 color negative film and
have it processed normally.

Technicolor which is actually a black and white negative process (producing
seperate red, green and blue negatives on black and white film) could very
easily be manipulated and often was. Look at the recent prints (or the
DVD from them) of The Wizard of Oz.

The original intention was to produce a movie that was almost cartoon
like in its color, later prints were much more subdued, almost "normal"
in color as well as the video tapes made from them.

Geoff.

--
Geoffrey S. Mendelson, Jerusalem, Israel N3OWJ/4X1GM