gamma). From this point, drop straight down to the
time of development line and read 7.5. It takes 7 1/2
minutes of developing time at the recommended
such as cleanliness, accuracy, and proper preparation
Contamination can ruin a developer which, in turn,
could ruin your images. Things, such as dirt and dust,
in the solution can cause artifacts on the film.
Use a good-quality medium-strength detergent to wash
glassware and other vessels. Be sure that all washed
entire area clean to prevent contamination and ensure
changes that have taken place over many years.
These improvements are made to keep pace with
improved sensitized materials, processing equipment,
and environmental regulations.
The preparation and use of photographic solutions
must be a systematic procedure based on accurate
measurement and standardized methods. High-quality
standards can be achieved only when the conditions of
exposure, chemistry, and processing are all within
operating tolerances. Then results are predictable.
use. This helps us to keep chemicals up to standard.
Analysis of the components of processing solutions is
adjusting their composition for future use. These
procedures are used to determine proper replenishment
rates to promote the efficient use of chemicals.
Quality assurance procedures are implemented, so
solutions are mixed, used, and discarded properly.
desirable, predictable, and consistent results.
Chemical analysis procedures used to indicate
chemical activity are valuable only when the samples
analyzed are representative of the processing solutions.
The analysis of a sample taken improperly may do
more harm than good in controlling the process.
precipitate. Even a clear solution may have different
concentration levels in various parts of a processing
tank; for instance, the chemical composition at the
other parts of the tank. To compensate for this, you
must use a prescribed procedure, so all the samples
are taken from the same location, such as from a point
near the tank overflow. These samples should be
representative of the solution at an established
Advanced Photography Course