September 2001 • CIS-221
CURRENT INFORMATION SUMMARY
Calibrating KODAK PROFESSIONAL
PORTRA Black & White Paper in the
Durst Dice America Epsilon 30 LED
Printer
5. Expose and process the calibration target image. Read
This procedure will show you how to use the controls within
the Epsilon 30 Printer to adjust exposure of each CMY color
separately to give a final excellent black-and-white image.
This procedure will show you how to control cyan with the
Density filter, magenta with the M filter, and yellow with the
Y filter.
The initial M, Y, and Density filter settings in the
procedure below were determined for the Epsilon 30 with
LED cooling kit, Software Version 2.5 Revision 02 only.
Settings for other models may differ slightly.
just the C, M, and Y separation D-max steps with a
handheld X-Rite densitometer. You may need the color
reference target mentioned above to locate the C, M,
and Y D-max steps. The aim densities are as follows:
Cyan D-max
R 1.50 ± 0.05
Magenta D-max
G 1.22 ± 0.04
B 0.58 − 0.03
(no upper tolerance)
Yellow D-max
If any of the measured densities are outside the ranges
specified, or if any of the next lower steps to the D-max
step appear to have hit a plateau for several steps,
proceed to step 6; otherwise, go to step 7.
Use a color print of the Epsilon 30 calibration target for
color comparison. Note the location of the cyan, magenta
and yellow separation step tablets and locate the D-max step
in each tablet (extreme right)—they are not obvious in the
monochrome print.
The procedure below requires that an X-Rite densitometer
(or equivalent color densitometer) is available to hand read
the RGB densities from the C, M, and Y separation D-max
steps.
6. If the red density of the cyan D-max step is too dark
(greater than 1.55) or too light (less than 1.45), adjust
the Density filter (only), and repeat the exposure/
process cycle with each new Density setting until the
red density is on aim. (Example, if your first exposure
is too dark, you need to add Density in the “current
paper calibration” menu to reduce exposure.)
PROCEDURE
Note: Do not calculate a new LUT (Look Up Table)
1. Start by selecting “Paper,” “List Paper Types,” then
“New Paper” in the Durst calibration system
between iterations.
Proceed to Step 7 when the red density is in range.
2. Select “New Reflection Paper” and set up
“Description,” “Width,” and “Length.” Leave
everything else at their default values.
7. If the green or blue D-max densities are too high, keep
the Density filter at the same value as in Step 6 and
repeat the exposure/process cycle with new M and Y
filter settings. Add M filtration if the green D-max is
too high; subtract M or Y filtration if the green or blue
D-max is too low. Do so until the green and blue
densities of the D-max steps are on aim and the
adjacent steps can be discerned (no plateau).
3. “Open” the file and then “Paper,” “Paper Calibration,”
and “Show Current Paper Data.”
4. Set the following “Basic Calibration Filter” values to:
D
0.700
0.000
0.000
0.000
Cyan
Magenta
Yellow
Note: Up to now you should not have read the strip
using the Epsilon X-rite DTP36, nor should you have
ever run an Epsilon “calculate” step. Your last
calibration exposure should be on aim for C, M, and Y
D-max. The text in the calibration target image should
look clean and should have very little fringing. (See the
text above step 21 in the neutral tablet; that text is very
small but should look clean.)
Do not adjust the cyan value at any time; this is always
zero (0.000).
©Eastman Kodak Company, 2001
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