XP-2 Super at room temperature?

[koraks]

That's fascinating; here's the CineStill times and the Digibase times in one chart:

Take your pick...or anything in-between, LOL!

 

[Donald Qualls]

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...

 

[koraks]

They're both based on CD-4. I really couldn't say whether the difference tracks back to actual product differences or methodology.

 

[Donald Qualls]

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.

 

[koraks]

That'd be cool!

 

[MattKing]

That'd be cool!

Or at least temperate

 

[WD4AON]

I'm looking forward to shooting and processing XP-2 Super slit for Minox, and because the Minox daylight loading tank isn't very practical for temperature maintenance I hope to do it at room temperature. I should only need to adjust time for temperature, since there aren't any color layers to get out of balance with slower development. My calculation (at 4% per degree F) gives about 10:40 as a working time at 68F/20C -- has anyone done this who can confirm the time?

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

 

[Donald Qualls]

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.

 

[WD4AON]

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

 

[koraks]

It is the high temp C41 that bothers me thus far

Stop worrying and love the bomb. It's pretty easy.

 

[pentaxuser]

Stop worrying and love the bomb. It's pretty easy.

Slim Pickens did . He was probably the last rodeo rider of a bomb that was ever seen in the world

pentaxuser

 

[Raghu Kuvempunagar]

I was going to ask this question but then I had already asked some years ago.

Simple C-41-like Developer for Ilford XP2

I'm renewing my interest in developers, and I'd like to create a simple developer only for XP2-super that creates dye-clouds, in order to get finer grain than one gets by developing XP2 in a B&W developer. I'm willing to weigh and mix three (possibly four) chemicals shortly before development...

www.photrio.com