After a few more results with Caffenol-C-F I have to state that compared with my other Caffenol receipes this is a weak developer giving thinner negatives. It has less Vit-C and the sulfite is also slowing down the development. So for boxspeed you might need about 20 minutes development time, Also less sulfite may be good for better film speed, maybe 30 or 40 g/l. You can play with the amount of sulfite without any other change, but you probably have to adjust the dev time. We see exactly the same behaviour as with regular fine grain developers, smaller grain -> less speed. But together with Rodinal/Parodinal we get a developer on steroids, still producing acceptable fine grain. And still we need more experiances with Caffenol-C-F and the Cardinal developer.
And no, there won't be a pope developer. The original latin "cardinalis" has nothing to do with katholizism, nor do I.
TMax 400 @ 800, Cardinal developer 12 minutes, 20 °C, regular agitation. The Tmax 400 was difficult in Caffenol-C, a lot of fog and rather large grain. Now we have reasonable fine grain, no fog and speeds up to 3200.
Best - Reinhold
