Help analysing results of Tri-X reversal, please
I need help understanding how to improve my first (successful) Tri-X reversal process test, please. I'm a bit hazy on how to think about the dev/exposure relationships within reversal processing.
I have run a test film strip of exposures on 35mm with 200ASA as the base and EVs of +1, 0 - 1.
The film was dev'd in strong Rodinal of 1:15 at 10 mins according to helpful suggestions from poster Tofek. The rest of the process was as the Foma Reversal Kit suggests. I reduced the Potassium Permanganate by 40% to help save the Tri-X emulsion from going too soft. (I am using the Foma kit to get started).
I cannot scan today but have photographed these on a light box. I think you can see the gist of the results. I can post close-up of each frame if needed.
I'm very happy and excited that I got a reasonable result but want to address the weaknesses of the process. What I am seeing is weak blacks and grey-looking hi-lights. An overall flatness. The -1 EV frame has the strongest contrast.
I'm guessing the exposure is OK - at least at EV 0 or -1. Is that right? The EV+1 seems to have no greys in the upper range.
Can adjusting the dev time improve the image and contrast? And if so which way?
Or do I just need to use a more vigorous, high contrast developer like Ilford PQ, for example. I guess I'm getting low contrast by using the TriX.
Is there another factor, I'm missing?
I may switch to D94 and mixing my own chems in the long run but at the moment I'd like to try and get what i have working to it's best advantage, if possible. I have Rodinal and Ilford PQ.
Last edited by mr.datsun; 02-03-2013 at 10:24 AM. Click to view previous post history.