Originally posted by rdenney A strong acid stop bath is the main culprit with reticulation, and also poor temperature control. I use a water bath instead of a stop bath.
But this does not look like reticulation to me.
Rick “think big grain, not big splotches” Denney
Originally posted by tuco Okay, a good combo there. I'd add I've experienced something similar (without spots) with 400TMY and PanF but on a much smaller scale a few times in the last couple years.
Originally posted by TonyW This could easily be reticulation. Some films more likely to experience than others. I would consider safe films from the likes of Kodak and Ilford; safe in terms of less chance of reticulation.
The biggest cause of reticulation is big temperature changes occuring rapidly. So going from a 'normal' dev temp to cold fixer or even cold wash can cause a 'shock' to the emulsion with the result in reticulation.
Thanks everyone for the info, I hadn't even heard of reticulation until now. I don't believe that this is likely to be the case here as I take quite a lot of care with temperature of the chemicals I use. These were developed in late January I think, and though the thermometer is usually in the developer rather than the fixer or stop bath, this roll was developed last so the fixer had had plenty of time to stabilise at room temperature which would have been very close to the 21ºC or so of the developer. The stop bath, being a use-once chemical, would have had less time but had still been in the basin of water for 25 minutes or so when it was used.
Anything's possible and as some have commented, some films are more prone than others, so whether this is reticulation or the pattern is film damage, I won't be buying more Fomapan 100 (or any other of the Fomapans).
Here are a few others from the same roll, which show far less of this problem, but they have very little sky in the image so perhaps that is just hiding it. These ones have a vehicular theme.
Yashica Mat 124G Fomapan 100 2017 002a by
Jonathan MacDonald, on Flickr
Yashica Mat 124G Fomapan 100 2017 003a by
Jonathan MacDonald, on Flickr
Yashica Mat 124G Fomapan 100 2017 007a by
Jonathan MacDonald, on Flickr