danz
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- Joined
- Aug 19, 2008
- Messages
- 1
- Format
- Medium Format
Hi,
Ive been looking around for a good film/developer combo in order to get a really high contrast film, meaning no shades of gray. I think I'm looking for a characteristic curve that is sigmoidal with a really sharp slope in the middle (http://local.wasp.uwa.edu.au/~pbourke/other/functions/sigmoid1.gif with a=2)...
I know that increasing iso/overexposing and overdeveloping should give this kind of curve but I'd like to get the optimal developer for that purpose. For what I have observed it seems that the first plateau of the sigmoid is not flat enough with D76 at long development times and I fear shades of gray... LOL! I'm goona try D-19 with TMAX100 at iso 100-160, is it a good idea?
I probably need litho film but I'm currently shooting 35mm and 120 and havent seen such negatives in that format.
thanks a lot!
Ive been looking around for a good film/developer combo in order to get a really high contrast film, meaning no shades of gray. I think I'm looking for a characteristic curve that is sigmoidal with a really sharp slope in the middle (http://local.wasp.uwa.edu.au/~pbourke/other/functions/sigmoid1.gif with a=2)...
I know that increasing iso/overexposing and overdeveloping should give this kind of curve but I'd like to get the optimal developer for that purpose. For what I have observed it seems that the first plateau of the sigmoid is not flat enough with D76 at long development times and I fear shades of gray... LOL! I'm goona try D-19 with TMAX100 at iso 100-160, is it a good idea?
I probably need litho film but I'm currently shooting 35mm and 120 and havent seen such negatives in that format.
thanks a lot!
