• Welcome to Photrio!
    Registration is fast and free. Join today to unlock search, see fewer ads, and access all forum features.
    Click here to sign up

XP-2 Super at room temperature?

That sounds like they may be different formulae -- perhaps even different developing agents (though how you'd call anything that wasn't CD-4 only C-41 I don't know). Of course, that could just mean Cinestill used very slightly different data points to fit their curve and didn't test the extremes. Lots of bad science has come out of fitting the curve to noisy data...
 
Well, in any case, I'll try to be sure to check back here once I've done this (for 20+ minutes at 68F) and got some scans.
 

Donald: Google: "room temperature c-41 color film development". 73, Terry
 
Donald: Google: "room temperature c-41 color film development". 73, Terry

I found the article you were probably pointing to, and it confirms what I already knew: color balance is the big issue. That, however, shouldn't matter with a black and white C-41 material. It does look like I need more than the 10:40 I originally calculated (linear vs. curve fit time correction), but it looks like 22 minutes will be a good starting point. Consistency would be an issue with the Minox tank even at 100F, because it takes longer to fill and drain than modern tanks like a Paterson -- and for a 3:45 development time, the time to fill and drain is a significant fraction of the total dev time.
 
I'm very much interested in your results. I'/ve not done C41 color yet (I send my Minolta 16mm films out at $3 w/o scanning, so why bother with it). I'm just loading some XP2 into Minox at the moment and hope to compare C41 XP@ with XT-3 developed XP2 16mm. It is the high temp C41 that bothers me thus far, so room temp and longer times suit me fine. TIA, 73, Terry
 
I was going to ask this question but then I had already asked some years ago.