I wonder in which camera it does perform well, I had the scratches with a Mamiya M645, Mamiya C330 and my Fujica GW690. In the RB67 the film travels the same path as in the M645 so I guess I don't need to try that. I recently got a Rolleiflex, maybe it works beter in that camera.
The recent batches I am using work fine in my Fuji GW690III, Fuji GA645, and my Rolleicord Va (which I purchased in an almost unused state). With my other TLRs (more beat-up samples) I still get some of these parallel hairline scratches.
Again, mechanical and chemical stress on the emulsion seem to exacerbate any issues.
Replace stop bath with water, don't touch the emulsion when wet, no ham-fisted loading on the reels, no high energy agitation during development/fixing.
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