Kirk Keyes
15-Apr-2004, 14:36
Has anyone seen any development curve graphs (H&D graphs) for a film processed in a pyro that had variations in the processing scheme? So these things stay the same: film, developer, development time and temp, agitaion. Things that would change are: water rinse after developer vs. acid stop bath, hardening fix vs. rapid fixer (no hardener) vs. alkaline fix, alkaline afterbath (not spent developer, but say a sodium carbonate solution) vs.no afterbath, short wash time vs. long wash time?
What I want to see are how much difference any of these processing variations affect the stain. From my very few tests (acid stop vs. water bath, alkaline after bath vs. no afterbath, short wash vs. long wash), none of these things really affect the intensity of the stain very much. Graphs should also contain blue vs green densities, so we can see that the variations don;t affect the silver density (green channel), but only affect the stain (blue channel.)
I don't want to hear anectodal evidence - I want to see some comparisons with real numbers.
Kirk
What I want to see are how much difference any of these processing variations affect the stain. From my very few tests (acid stop vs. water bath, alkaline after bath vs. no afterbath, short wash vs. long wash), none of these things really affect the intensity of the stain very much. Graphs should also contain blue vs green densities, so we can see that the variations don;t affect the silver density (green channel), but only affect the stain (blue channel.)
I don't want to hear anectodal evidence - I want to see some comparisons with real numbers.
Kirk