Buying 100' of BW....

[DNG]

I am looking at a bulk roll of Illford Delta Pro 100...
To be developed in Xtol, I use 1:1 for Plus-x and Tmax 100

Any Dilution recommendations, I don't want contrasty neg's for scanning. And my room temp for liquids is 23c not 20c.

I agitate every 90s, which makes about 4 times 7mim for 1:1, and my Tmax neg's are good.

Don't know how Delta Pro will process in 1:1. Just looking at a starting point. I'll fine tune it with each roll, until I get what I want.

Thanks for some wisdom.

 

[Leigh Youdale]

By my rough interpolation with Stock solution times I'd add about 30% to arrive at a 10 minute time with 1+1 dilution @ 20C. But then temperature compensation would pull that back to about 7:30 @ 23C. That's fairly consistent with your Tmax 100 times and the emulsions are of a similar type. I'd start there and if it's a bit too much contrast for your taste, do the next one at 7:00 mins.

 

[DNG]

By my rough interpolation with Stock solution times I'd add about 30% to arrive at a 10 minute time with 1+1 dilution @ 20C. But then temperature compensation would pull that back to about 7:30 @ 23C. That's fairly consistent with your Tmax 100 times and the emulsions are of a similar type. I'd start there and if it's a bit too much contrast for your taste, do the next one at 7:00 mins.

Would higher delusions provide lower contrast?
How do I figure that out?
Is there a chart somewhere?

I think with Xtol, the less agitation, the better the shadows are in detail.

 

[jmcd]

"I think with Xtol, the less agitation, the better the shadows are in detail."

Yes, but you must fine tune to strike the balance (of exposure, developer dilution, agitation, and time) that gives you the tonal range that looks excellent to you.

There comes a point where too little agitation creates a print that has an overall flatness, so I usually agitate every 60 seconds, or 30 seconds with some pairings of film and developer, and favor more exposure to keep the shadows well developed.

 

[dfoo]

I use rotary processing with XTOL 1+1... much simpler as there is one less variable to keep track of. To test my film I do a number of shots of the same scene with different exposures (ie: as metered, -2 stops, -1 stops, +1 stops, +2 stops) and then develop the film with a few different times. For example, 10 minutes @ 20C, 8 minutes @ 20C and 12 minutes @ 20C. That shows me the actual effect of the developer and the exposure and lets me make a judgement from real prints the tonality and exposure.

 

[DNG]

I use rotary processing with XTOL 1+1... much simpler as there is one less variable to keep track of. To test my film I do a number of shots of the same scene with different exposures (ie: as metered, -2 stops, -1 stops, +1 stops, +2 stops) and then develop the film with a few different times. For example, 10 minutes @ 20C, 8 minutes @ 20C and 12 minutes @ 20C. That shows me the actual effect of the developer and the exposure and lets me make a judgement from real prints the tonality and exposure.

I also a rotary tank.
I guess you shoot 3 short rolls>
I'll have to give your suggestion a try.

 

[dfoo]

Yes, for the above I'd shoot 3 12 frame rolls. On each roll I'd expose 6 frames. I've also fooled around with loading the camera in the dark room so I can use shorter rolls, but its more trouble that its worth to me.