August 4, 2010
2 posts belowyou can see the effects of different agitation. From extreme uneven development with stand development to a dramatic improvement with standard agitation.
When adding the restrainer potassium bromide (KBr), we see perfect even develpment up to the reel covered borders - even with minimal agitation as shown here. With intension I made no proper black adjustment here to show the improvement in the clearest possible way.
So here's my recommendation:
If you are satisfied with "regular" Caffenol-C like C-C-M, be happy. If you experiance uneven development, agitate more (you will have to adjust developing time). If still not satisfied use Caffenol-C-L.
The benefit of C-C-L besides the 100% perfect even development are reduced grain and almost fog free negatives.
Caffenol-C-L will be my standard in the future. My 100 g box of potassium bromide will last for a couple of films ;-) Caffenol-C-M will still be my standard as an easy to use and easy to get developer with enhanced film speed..
So if you can get KBr for a resonable price in your country, buy it! You won't be disappointed.
Cheers - Reinhold