check this EIR info sheet out

["Christina Z. Anderson" <tracez@xxxxxxx>]

Here I go again:  I have compiled info on color infrared to hand out to my
students.  Since it isn't too long I thought I could cut and paste it below.
IF I am wrong anywhere with my info, can you let me know?  I have reviewed
all posts to this list that pertained to color EIR before I wrote it, but
there were some conflicts there.  Thanks.I also did get the new Kodak tech
info sheet which (gulp) I have not read yet.
Chris

Color Infrared

     This is a false-color ester-based film with no antihalation coating.
It is sensitive to IR waves in the 700-900nm range.  Same color objects may
record differently on the film due to their inherent IR reflective
capabilities.
     In normal color film there are three layers: RGB, corresponding to red,
green, and blue.  In IR color film there are three layers:  RGI,
corresponding to red, green, and infrared.  The red sensitive layer produces
magenta, the green sensitive layer produces yellow, and the infrared
sensitive layer produces cyan. All three layers are sensitive to blue, hence
at least a yellow filter is required when shooting or else the film will
have an overall magenta cast or be washed out.
     You do not have to alter your focus with color infrared as you do with
BW Infrared.  It is also not as crucial that you load and unload in total
darkness.
     Filter choices that would be good are:  Yellow #12, Orange #16, and Red
#25.  The colors produced with each of these filtrations are as follows:
#12 will produce magenta grass and foliage, bluish purple skies, and dark
blue or black water.  The #16 will produce red grass or foliage, dark blue
skies, and dark blue or black water.  The #25 will produce deep orange grass
or foliage, yellow green or dark green skies, and dark green or black water.
Also, the #25 will record whites as light yellow, unlike the other two
filters, which record white as white.  Fall foliage may record brown or tan.
     Filter factors will require 1 extra stop for the yellow filter, 1 1/2
stops for the orange, and 2-21/2 stops for the red.  However, before you do
the math, read the exposure guidelines below.
     The film tends toward overexposure, so when in doubt, decrease exposure
1/2 stop.  Metering:  if you are metering with a hand-held meter, plug in a
200 ISO. If you are metering through the filter with a through the lens
meter (TTL), plug a 400 ISO into your camera.  If you are combining a
polarizing filter and one of the other filters on your lens and metering
TTL, plug in 200 ISO.  On a sunny day, meter your brightest area and expose
accordingly (remember, this is slide film).  On an overcast or hazy day, an
overall meter reading will work fine.
     A normal exposure to expect with the yellow filter might be:  f16 @
1/125th, hazy f16 @ 1/60, light clouds f11 @ 1/60, and moderate rain, f8 @
1/30.  Try two stops less for each of these if you combine a polarizer on
top of the filter.  Indoors with a flash you may find (using 1/60 shutter
speed) at 5 feet from your subject you are at f16, 10 feet f8, 15 feet f5.6,
and 20 ft f4.
     When you bring the film in for processing, which can be done E-6, make
sure they know it is infrared sensitive and that they turn off their LED
sensors on their equipment or it will fog the film or run red streaks
through the length of the film.



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