tron: as noted in my post bromides (and chlorides/iodides in smaller amounts) are released by the film emulsion.
Originally Posted by tron_
In response to Gerald and ic-racer, that has always been an interesting question. The prevailing wisdom is to develop film to a lower CI and increase paper grade. But depending on the film, developer and subjective considerations ic-racer's opposite proposal may or may not work too. The question in any particular case is whether the difference in film granularity from developing the film to a lower or higher CI has a greater, lesser or equal/offsetting effect in comparison to the change in paper contrast.
I suspect in most cases the increase in graininess associated with higher contrast printing is 'smaller' than the decrease in film granularity resulting from reduced film development (ie you're slightly better off developing film to a lower CI and increasing print contrast) but this could vary. There would however typically be other benefits to developing the film to a slightly lower contrast as decreased granularity can have a beneficial effect on acutance and fine detail (or what has been referred to in the literature as "detectivity").
Last edited by Michael R 1974; 07-19-2013 at 10:44 AM. Click to view previous post history.