Comments: 1 min presoak to get rid of the antihalation backing. Agitation a la Gordon Huchings, every 15 seconds. I use Kodak’s rapid fix but I don't use the
hardener. I've been experimenting with maco 820 as a replacement for HEI. I’ve been using 120 format so I can bracket like hell. This is with an 87 filter. I set my spot meter
to an iso of 3 (that's as slow as it will go), meter the shadows that I want in zone 3, and actually have to either open it up a stop, or increase exposure time by a stop. So the speed I use is actually 3
stops slower than IE of 3. I get a nice effect with this combo...haven’t done any testing for n+1 or n-1. Under tungsten light without a filter (same process as above for development) I get an EI
of 50 (incident reading).