LESSON 3
Figure 31. Timetemperature chart
2. Certification and replenishment. The equipment and methods presently
used for compounding photographic solutions are the result of changes that
have taken place over many years. These improvements have been made to keep
up with the general demand for higher quality in the photographic product,
and are made possible with modern designs in optics, cameras, processing
equipment, and the ever increasing variety of sensitized materials.
a. The preparation of solutions can be compared to the fulcrum of a
balance. On one side, we have the optics and mechanics of exposure; on the
other side, we have the chemical and mechanical conditions of processing.
Conditions of exposure demand equal care and control in processing. You
must balance one against the other for optimum results. Substandard
solutions make it virtually impossible to carry on a processing operation
within controlled limits. Any degree of uniformity obtained from an
uncontrolled operation is purely accidental and cannot be considered
reliable.
b. The highest quality standards can be achieved only when the
conditions of exposure, chemistry, and processing are normal or within
operating tolerances. The net desired situation, with
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