LESSON 3
SENSITOMETRY AND PHOTOGRAPHIC
PROCESS CONTROL
OBJECTIVE:
In this lesson you will be told how to produce a photographic sensistrip, determine the gamma
from it, and plot that gamma on a process control chart. You will then evaluate the process control
chart and initiate the action it requires.
Upon completion of this lesson you will be able to:
1.
State the purpose of sensitometry.
2.
State the four processing variables and select the one which is the most difficult to
control.
3.
State the purpose served by a process control chart.
4.
State which fact, when plotted on a process control chart, is used to monitor
replenishment.
CREDIT HOURS...................................................................
Hours
MATERIAL REQUIRED......................................................None
SECTION I
3-1.
THE PURPOSE OF SENSITOMETRY.
Sensitometry is the science of measuring film sensitivity. Its purpose is to provide photographers
with an objective testing and quality control service. It also provides a wealth of information, not
available otherwise, concerning photographic materials and processing.
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