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Acufine / Tri-x - 1 stop push dev time?
Posted: Fri Jan 27, 2017 8:26 am
by neal.niemiec
I'm surprised to see no dev time for +1 push (800) w. Acufine published on Digital Truth. (400 = 3 minutes /1600 = 10 min) What is the rule/math for increasing developing time for this developer for a +1 push? Any additional input/experience to share on Acufine is certainly welcome. I'm doing a bunch of testing & vs. my go-to rodinal.....
Happy Friday!!!
Acufine / Tri-x - 1 stop push dev time?
Posted: Sat Jan 28, 2017 8:41 am
by perfesserkev
Hi Neal,
I just dug up my old notes and have a time of 6min for ISO 1000 @ 70°F with intermittent agitation. I haven't run Tri-X in Acufine in a couple decades -- used it to hit 1600 or 3200 when necessary.
You might try that time at 800 for a better neg. My task was to get highest speed possible, shadow detail be damned. I also don't know ho today's Tri-x will react to it. That was the chunky old stuff.
Acufine / Tri-x - 1 stop push dev time?
Posted: Mon Jan 30, 2017 7:15 am
by neal.niemiec
Thanks Kevin!
Re: Acufine / Tri-x - 1 stop push dev time?
Posted: Sun Mar 19, 2017 12:04 pm
by darkroommike
I'm pretty sure Acufine is still Acufine but Tri-X (now 400TX) is not the same stuff we were pushing 20-30 years ago, Tri-X 400 and is surely not the stuff I was using in the late 70's Tri-X 5063. The Acufine data sheet says rate new Tri-X at EI 1000, calls for 5 minutes (that's only a 1/3 stop off). I would not use a shorter time.
I actually prefer Acu-1 one shot for consistent results.