I recently established a film speed of 320 for Tri-x. I have been attempting no rmal development tests. According to Ansel you should expose several sheets of film at zone V and zone VIII. Continue upping your develpment from manufactures recommendations until zone V has a net density of .60 to .75 and zone VIII has a net density of 1.15 to 1.35. I realize I have incorporated the density recomm endations for both diffusion and condenser enlargers. Unfortunately things seem to have gone a little haywire for me. At five miutes in T-max RS at 68 F in go t net densities of .7 and 1.08 and at 6 minutes .75 and 1.13. The Zone V part s eemed ok, but I seem to be in zone VII rather than VIII at the upper end. I ass umed upping the develpment time was not an option because zone V would then be t oo high.I thought perhaps I had exposed things wrong so I did a couple over and zone VIII was even lower. I used a dark slide cut in half so I could get both z ones on one sheet. I used different shutter speeds for the different exposure se ssions. Any ideas before I start again ?
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