manuals, such as Kodak's Z-series, are necessary
supplements to a color process-monitoring system.
The monitoring manuals describe the process, the
specific control strip to use, the steps to read, the
calculation of reference values and control values, the
specific plot patterns, and the plot-pattern
light-sensitive material or process. The most common
control strips used in Navy imaging facilities are
Kodak process-control strips. Like black-and-white
control strips, color control strips have a series of
neutral-density steps. Process monitoring relies
primarily on the measurement of densities of the steps.
tones. Monitoring D-max is also desirable for color
reversal film and paper. The relationship among the
three color measurements of a step is used to monitor
color balance. The difference in the readings from the
two steps (HD-LD) provides measurements of red,
green, and blue contrast.
stabilized and given an expiration date, so they
provide a reliable tool to monitor processes. The
strips should be removed from the freezer, one at a
time, as they are needed.
processed strips is included with each package of
control strips. These processed strips are called
for imaging facilities to determine a process standard
in terms of densitometer readings.
specified steps, you can determine the initial reference,
mean, or aim values.
establishing a process-monitoring system are as
procedures, processing temperatures, times, and so
generally consists of reading the reference strip on the
densitometer, recording the densities, and adding or
subtracting correction factors (supplied with control
strips). (See fig. 2-16.) When available, average the
reading of several reference strips to minimize the
effects of variability.
number. A code number is assigned to each emulsion
batch, and this code number changes with each
emulsion batch manufactured.
a continuous processor with the low-density end first.
The end of the film with the low-density steps is
indicated with a dimple on the film. You should also
feed the control strips into the processor at the same
location of the feed tray. It does not matter whether
you feed from the center, the far-right side, or the
far-left side. It is important for you to process the
densitometer and average the values.
Advanced Photography Course