I use FP4, HP5 and Delta100. I rate each at half box speed, but up rate them to approach box speed as I increase development. By around about N+2 or 3, they are at box speed. I use Pyrocat HD for FP4 and HP5, HC-110 for HP5 for ziatypes (I need mega development for contrasty negs. I haven't tried silver printing one of these, but it may already have what I'm after???). I use Rodinal 1:50 for Delta100. Are any of these appropriate for what I'm after (I'd rather not add a 4th sheet film if possible)? It was mentioned that HP5 would not be good, but I'm not sure I understand why, as it has such a nice long straight curve- I thought this was what I'd be after (to have all the tones on the curve in order to expand them and not just add density to "mush")...
Is it because it doesn't expand well (I've been told it's better for bringing contrast under control vs trying to get more)?
Tim
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