I'm new at 4x5, and after scratching many negs using Ansel Adams' tray technique, I built a slosher out of plexiglass. It's meant to behave like the commercially available one. Sides and bottom have 5/8" holes in rows drilled to allow (I thought) free developer movement. Mine takes four negs and just fits an 8x10 Paterson tray.
As expected, my negs are now scratch free. Unfortunately they are not uniform. I can see darker areas that match up to the holes on the sides and bottom. I've been using outdated TriX to try to master this, developing in 1:1 D76 for 10 min at 20C with agitation every 30 sec.
Any ideas, other than the obvious not good enough circulation in the slosher? The negs are not sticking to the bottom. I'm using 1 liter of developer in the tray, more than enough to cover the negs. Film could be exposed to air during agitiation, which I do by raising end and sides twice each.
Thanks
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