Practice question · True or false
A condenser enlarger produces a more contrasty print from the same negative than a diffusion enlarger does.
Hints
- Silver grains scatter light as well as absorbing it.
- Light scattered out of the projection path counts as absorbed.
Show the answer
True
Why
True, by the Callier effect: collimated light scattered by the silver grains leaves the projection path, so dense areas read denser than their diffuse density. The difference is worth about one paper grade, which is why manufacturers publish different target contrast indexes for the two kinds of head.
Practise The Enlarger and the Print
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