Alan Johnson
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- Joined
- Nov 16, 2004
- Messages
- 3,244
(1)The density with D316 was very slightly higher than Xtol 1+1.You did a great job in formulating this concentrate,the pH was near enough spot on and you managed to dissolve a lot of AA by using the metaborate first.I appreciate your doing this, as it's always good to have reviewers check one's work. Some questions:
* How do the densities of the two negatives compare? My goal was twice XTOL's dev-time, and I'm wondering how close I got for a conventional grain film.
* Could you compare grain by viewing the neg's directly with a loupe? I've found that even a dedicated film-scanner as good as my Nikon Coolscan IV ED does not reliably show grain due to focus-variation, so I trust direct viewing in a loupe or microscope more. Hmm, I guess a couple of carefully-focused extreme enlargements (projecting onto the floor?) would also clearly show the grain-difference.
* I notice that the area under the bumper is darker in the Xtol-scan, indicating a difference in black-point and/or gamma in the scans. How did you set these in your scanning software?
My goal is to get XTOL's grain in a concentrate, and I'll keep hammering at it. Feedback like this is good.
Mark Overton
(2)IMO the most reliable way to assess grain is with an enlarger,which I don't have time to do.However I know my V700 will easily pick up the difference between Perceptol and Xtol.I would be surprised if my conclusions are wrong.
(3)Good spot. But I might get cast into the outer darkness for answering that on APUG.
(4)I did wonder if you could make a very strong concentrate that would give a working solution closer in composition to Xtol ,which working solution could be re-useable by throwing out and replenishing 70ml each time.
But already the solubility limits are approached.