Here's an odd one: I haven't used fomopan before but having a couple of boxes from last year, and going on holiday in a couple of weeks, I decided to try half a dozen test exposures (+1, 0 -1 stop) with a couple of lenses to see how it went.
Exposed, cooked it in R09 (2 min wash, 9 mins 50:1 development, 2 mins wash, 4 mins fix) - and got absolutely nothing on any of the six sheets. Not under exposed, but nothing. Nada, zip, zilch. Absolutely clear film.
The only sensible thing I can come up with is that the R09 has oxidised: it was from a 120cc bottle of concentrate, of which about half had been used (successfully) towards the end of last year.
Any other thoughts? I suppose it could be a bad batch of film (someone forgot the emulsion?) but they remembered the anti-halation dye. One thing: when I have used R09 with my usual Adox CHS, the first wash produces a deep blue product, but the used developer comes out red. In this case, the first wash was bright green, but so was the used developer...
Next approach will be with a fresh bottle of dev, perhaps just on an sheet exposed to daylight. It *ought* to go black...
Any help appreciated, thanks.
Neil
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