I finally got around to scanning my Pancro test negatives today, one developed in Pyrocat HD 1:1:100 at 20 degrees C. for 18mins (an initial guess time which proved to be quite a bit too short, this film needs lots of time in the soup! Bergger later emailed me with correct times and temps, as listed above,) and another at 2:2:100 20 degrees C. for 11.5mins (a lot better density and contrast,) and on both have noticed the exact same banding fault as mentioned in this thread at Large Format Photography Forum:
https://www.largeformatphotography....R-Pancro-400&p=1414835&viewfull=1#post1414835
The banding is faint but easily seen, with parallel lines running down short edge of all of my 8x10” test sheets. All four of them, all developed independently in trays. I'm 100% certain it's not a developing fault as I also developed 20 sheets of HP5+ with the same Pyrocat batch over three days, none of which have any fault whatsoever. I then wondered if it was a scanner problem, but only the Bergger shows the problem within a run where I scanned 20+ negatives. I haven't had time to examine the negatives closely yet, but assume under magnification the banding will be seen; I've never seen this fault in any of the thousands of scans I've done with my V800. Highly textured, detailed areas don't show the fault up, which is perhaps why I haven't noticed it until now.
Could this simply be a coating fault? Doesn’t seem like x-ray damage as looks too consistent and straight, with more abrupt edges to the bands.
This film does claim to have a special base anti-hilation layer that gives a higher than usual (compared to competition) base density. Could it be a problem with this special layer, with coating problem emphasised by pyro stain?
Anyone else seen this on Pancro or any other film?
Scan thumbs attached: One diptych image (both Pancro and both exhibiting the same problem, with a crop from the sky on left frame (contrast increased to make it more immediately noticeable.)
Any ideas?