Developing Pan F Plus Together With Delta 100 in Same Tank

[DF]

Pan F requires 8.5 minutes while Delta requires 12, according to the chart with D76 1:1. I've done Pan F with 10 minutes with good results, but If I bring it up to 12(to "please" the Delta), will it be damaged or just super high contrast? Is there an acceptable compromise between the two? Both rolls are of rainey night shots in the city - wet pavement reflecting lights/Christmas lights/cars zooming by/etc.
Or, should one NEVER EVER attempt such a thing? I'm trying to kill two birds with one stone - since my time slot allows for just one roll/set to be developed.

[bdial]

You probably don't want extended dev time for night shots, since the contrast will be plenty high already.

If you have two tanks put one roll in each, start the Delta, 4 minutes later start the Pan F.

Or, assuming you are working in a darkroom, and have only one tank, pre-fill your tank, load two reels with your film, making sure you keep track which is which. Put the Delta in the tank and start timing, after 4 minutes put the second roll in, put the cover on and turn on the lights.

[zsas]

PanF is contrast enough, but it depends on how the light was the day(s) it was shot. For eg, if it was sunny n bright, I'd not be too keen on pushing my PanF+....

[vpwphoto]

I attempt it now and then, then regret the outcome. Do it right the way you know you should.

[DF]

Sounds risky. There's only one tank with room for two reels. Are you sayong when 4 minutes are up, go in the darkroom, take the cover off, slip in the PanF? - What about the agitation?
BOTH rolls are the city at night under wet rainey conditions, wet pavement reflecting lights, traffic in motion, etc.

[Thomas Bertilsson]

If I were you, I'd develop them separately. Bring two developing tanks. If you can't do that, start with the Pan-F since its latent image stability is not as good as Delta. But seriously, with such a wide variation in dev time needed, you are either severely compromising one of the films, or worse yet - both. You could ruin all of the hard work you put into the shooting.
The lesson learned here is probably that it's better to shoot the same film on both occasions.

Good luck!

Pan F requires 8.5 minutes while Delta requires 12, according to the chart with D76 1:1. I've done Pan F with 10 minutes with good results, but If I bring it up to 12(to "please" the Delta), will it be damaged or just super high contrast? Is there an acceptable compromise between the two? Both rolls are of rainey night shots in the city - wet pavement reflecting lights/Christmas lights/cars zooming by/etc.
Or, should one NEVER EVER attempt such a thing? I'm trying to kill two birds with one stone - since my time slot allows for just one roll/set to be developed.

[desertratt]

Howard Hughes used to date three girls at one time. He's sit down at dinner with one, excuse himself and go have a bite with the second one and repeat with a third starlet. Doesn't sound very smart or fun, to me. There is a better way.

[sewarion]

well, the only reason for developing different films in the same tank is when i know that the same amount of time/temp/agitation works fine for both films. you might consider pulling the delta so 8.5 minutes would be an applicable dev time.

you might have to run some tests in order to find out which e.i. is appropriate for developing delta for only 8.5 minutes. or run some tests in order to find out how you should expose, under which kind of lighting, pan f for developing it for 12 minutes. or you might look for two different films which require the same dev time (e.g., according to the mdc, hp5+ @400 and ilford pan 100 @400 iso both require 12 min in 20°C xtol 1+1).

or you could simply develop films separately, respectively 2 of the same kind at a time.

sewarion

[Gerald C Koch]

I always worry that the pssible additives in one film may adversely affect the others. The T-Max films contain a lot of iodide which is a powerful restrainer.

[TareqPhoto]

Well, i can understand sometimes why processing 2 films in one tank, but why not just go with processing each in different tanks and using the proper time? I don't know how much you save time or developer by doing this, if i process only 2 films and say using concentrate developer without dilution then i can reuse it for another film when i am done with one, i am not good in developing so i don't want to imagine going this route, but i may try doing this one day if i have 2 rolls exact the same instead of 2 different films.