Developing JCH Street pan 400 ...at 800 iso

Hi guys, new here and very new to film.developing.

I usually shoot in 800 iso so when I got some JCH 400 I did the same ... Not reading much about it and not seeing that it's only recommended up to 500.

I looked for info and used the massive Dev app, but there was no timing information for this film at 800, it just want an option.

So I used the Film Developer Pro app as it had the JCH profile and would let.me select 800.

I developed in Rodonol at 1:25 for 12 minutes at 23c

...and the negatives were under developed. So so badlyso the timing was totally incorrect ncorrect, can anyone help me with Dev timings for this film at 800 iso? I can't find any information anywhere and still have ten rolls of this at 800 (which I won't do again). I wish I knew how to calculate this stuff myself.

I use Rodinol, Xtol and Microphen -hoping to find for all.

Thanks for any assistance.

Here’s one additional resource you can check out:

https://www.digitaltruth.com/devchart-mobile.php?Film=JCH&Developer=&mdc=Search

It lists an entry for using HC110 to push the film two stops.

But the truth is, your EI is determined by your shadow details. In other words, additional development time is unlikely to recover details that’s not on the negative. Details are recorded during exposure so under exposure guarantees you will lose detail in the shadow area. Additional development time can add density to the highlight areas, pushing them to a higher zone, or making them lighter, and increase the overall contrast of the image.

If you shoot an evenly lit scene, then your image will be underexposed throughout. If you shoot a high contrast scene, such as a sun lit alley way. Your highlights will probably be ok but the shadows will show no detail.

If you want shadow details, you will need to give it more exposure and develop normally.

I hope this brief explanation helped.

Hey there, thanks for the reply. Yes I used that chart (the app is the same thing)...that's the problem. it's missing everything for the 800 timings for all the developers that I use (rodinal, xtol and.microphen)

Thankyou very much for the info, it's helpful. I am after high contrast as thats the look I usually.go.for,hence why I shoot at 800 a lot..jch is so new to.me and developing is new also ...is there a formula I can use to.l calculate the 800 range from the 400? I know it's not as simple as doubling the time..

A lot.of the.detail is there,.I'm sure, the neg at the time in the attachment are practically.light grey ... Which points me to underdevelopment ...

Not sure exactly how to proceed - maybe add a minute or two to the calculated formula and try find the sweet spot, but as a newbie that worries me haha

I shot a bit of this stuff and I found the ISO 400 rating was very generous, you’d probably get better negs rating it at 200, maybe over develop the crap out of it for 800. For what it’s worth I was also using Rodinal.

Yeah, I won't make the mistake of doing 800 again after reading much much deeper into it. The two rolls I did were also Rodinal ...at the moment I'm.definitely thinking of adding more a few.more minutes but it'd be an experiment

Everybody is so busy trying to figure out the zone system they are afraid to actually shoot their film. Streetpan 400 pushes easily to one stop.

JCH Streetpan does just fine at EI800. I don't do it a lot but I do push it by one stop often enough to know that it works well. Not anywhere near as nice as TriX or HP5+ but it does ok. Try HC110 Dil B at 8 minutes. Make sure your solution temperature is 20C/68F and agitate continuous for 30 seconds to get things started then only twice per minute after that. You will lose some shadow detail in really contrasty light, just like a lot of other films, including the Hallowed TriX.

I shoot Streetpan 400 at box speed all the time and get extremely good negatives with excellent shadow detail. My primary developer is Beutler 1:1:8 for 11 minutes. In my experience JCH Streetpan is most sensitive to excessive agitation and to higher solution temperatures during development.

The DigitalTruth web site has a brief discussion on how one might approximate the development time for push processing.

https://www.digitaltruth.com/devchart.php?doc=pushproc

But you should probably do some testing by shooting the same scene at different EI repeatedly and then cutting the roll into strips (in the dark) and develop each strip at different times.

Hi ! I just got a JCH Streetpan 400 iso and I pulled to 100 iso.I tried to find some developing times with HC-110 but it seems people did tried that or I don’t know where to search.Have you tried to shoot it to 100?