Quote Originally Posted by Flotsam
When I tried Efke 100 in 35mm, I found that I had to rate it way down to get good shadow detail. I haven't seen this mentioned by others so it might just be related to my own processes and methods. Just thought I'd toss it in.
I haven't tried the 35mm version, but the 120 and sheet film versions produce excellent shadow detail when developed in Pyrocat-HD with minimum and semi-stand agitation. You do need to expose for the shadows, of course.

I do not find any need to use a hardening fixer with Efke 100. I use Photographer's Formulary TF-4 alkaline, non-hardening fixer.