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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 interpretation. 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. PROCESS-MONITORING PARAMETERS establishing a process-monitoring system are as follows: procedures, processing temperatures, times, and so forth. 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 |
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