Overview of the Process
This section gives an overview of the process of adjusting the color bal-
ance for a specific type of film.
Step 1: Image the internal gray scale test (Test Image 1). This test
image consists of sixteen boxes, each given a different expo-
sure.
Step 2: Use the densitometer to read each square of the test image.
Measure densities for red, green and blue.
Step 3: Record the results. Use the log sheets in the Appendix of this
user guide to record the settings. Use graph paper or a
spreadsheet program to plot the curves created by the den-
sity readings of the different boxes in the test image.
Step 4: Compare measured density readings with the goal densities.
See the section Goal Density Tables in this chapter.
Step 5: Adjust the brightness values first. The objective is to get the
measured density values in boxes 12 through 16 as close as
possible to the goal density values.
Step 6: Repeat the test image, process it, measure the density of the
developed image. Compare the results with the goal densi-
ties.
Step 7: Repeat steps 5 and 6 if necessary.
Step 8: Adjust the contrast values after you adjust the brightness
values. The objective is to get the measured density values
in boxes 1 through 11 as close as possible to the goal den-
sity values.
Step 9: Repeat the test image, process it and measure the density of
the developed image. Compare the results with the goal den-
sities.
Step 10: Evaluate your results. Repeat steps 8 and 9 if necessary.
Step 11: If the image is not bright enough or lacks sharpness, set a
repeat value.
6-2 • PCR II Plus User Guide
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