Practice question · Select all that apply
Why does a film developed with no agitation at all show streaks running down from the dense areas? Select every statement that is part of the reason.
Hints
- Three describe one mechanism in three steps; one invents a different fault.
- Follow the exhausted developer downward under gravity.
Show the answer
- A. Developer at the emulsion surface is exhausted locally and is not replaced
- B. The exhausted solution flows downward across the film below a dense area
- D. The products of development are denser than the fresh solution and sink
Why
The fourth is not what happens. The mechanism is purely a matter of flow: development exhausts the solution locally, the exhausted solution is denser and sinks, and the film below a dense area is therefore developed in weakened solution. Agitation exists to break that flow.
Practise Developing the Negative
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