I dug up my notes, and here's what I have for the Ultrafine Continuous Tone Duplicating film that ic-racer linked to:
2x enlargement factor (4x5 to 8x10)
4 minute exposure with a 135mm lens f/5.6 "HIGH" setting on D2 (250W halogen bulb)
1 min presoak 70F water. Constant agitation
6 min develop Formulary Liquidol (paper developer) 1+9 70F Constant agitation (it looks like I never tried HC-110 with this film)
-- This actually might be a bit over-exposed. 3 mins might have been closer to the proper exposure.
-- The usable exposure range for this film looks to be about 2.6-2.8 logE. It didn't capture all the steps in a 31-step Stouffer wedge
-- The development time I used resulted in a slope of >1 (logD/logE). 4 min dev gets closer to a 1:1 slope, but seemed to have some mottling, perhaps from incomplete development?
Keep in mind that if you're starting out with a smaller negative, your exposures could be greater, since the enlargement factor is larger.
Last edited by gmikol; 05-05-2010 at 03:33 PM. Click to view previous post history.