I think you'll get to the theoretical time to throw the chemicals away whatever the ISO is and be thinking 'these must be good enough for a few more films yet'. Like I said, there is enough leeway in the technique so that by the time you have exhausted the kit it makes little or no difference if you have mixed low and high ISO films during processing, it is only if you have predominately processed high ISO films (or push processed) that you would throw the chemicals away sooner.
#C 41 developing manuals#
The manuals are not clear in terms of developing various ISO films with the same kit although higher ISO films weaken the solution faster.Īs far as I can see the lower temperature makes no difference at all to the colour. However as a beginner, first I’d like to start with ISO200 films and then develop Portra 400s Ektar100s that I have shot and waiting in the fridge.
I have decided to do it at 38 as recommended with the help of a heater.īut main issue is about reusing, all the kits assumes the user using constantly same ISO film.
My confusion was around the temperature as only Colortec suggest lower developing temperature and if it has a worsening effect on colors. They are pretty much similar in terms of timings reusing etc.
#C 41 developing manual#
Yes the kit comes with the manual and I have reread it multiple times and also other kits manuals as well. So if you have a power cut and the water cools or the postman rings the bell it won't be a catastrophe (unless you have to go down 44 floors to collect your parcel). Yes, perfection is to follow the instructions to the letter, however you really won't notice with any slight variations and you need to make a massive mistake somewhere not to get something usable on the film. When all is up to the same temperature you can start.ĭon't bite your nails over the warnings about perfect temperature or technique. Stick to what that says and don't be swayed by tweaks to the process or other opinions.Īs regards the temperature I process at 30 degrees and use a fish tank heater in a bowl of water that also holds the mixed bottles of chemicals and also my Paterson tank with the film loaded. I'm at risk of stating the obvious but the Tetenal kit comes with and instruction booklet that answers all the processing questions including how long to extend the times. But check the instructions on your kit to calculate things precisely. You could count them as 2 if you want, to make your life easier and be on the safe side. That is, if I develop 2 ISO400 film, I adjust my times as if I developed 3. If I mix it in 1L batches, for every subsequent film +2%. I mix my dev in 500ml batches, for every subsequent film I give +4% more time. pouring back the used developer into a 1L bottle with "fresh" developer), every subsequent film will need less percentage of increase, compared to using say 500ml.
#C 41 developing how to#
There's instruction on the kit saying how to adjust time. 2-3 inversions, or spinning the agitator stick) every 30 seconds in small tanks. Even deviating a degree or a couple seconds at the recommended temp, will yield a better colour balance than being on the spot at the extended times of a low temp regime.Ģ. You can do it in lower temps, but it gives the best results at the recommended 39✬ temp. As C41 developers are re usable and higher ISO films has more deteriorating effect on the developer, let’s say my first batch of 4 films are ISO400 films, how should I change the developer timings for the subsequent batch? Or let’s say my first batch is ISO100, but next batch will be ISO400, what should I do for the 3rd batch?ġ. So should I constantly agitate my films or should I do like BW films, 5 sec at each 30sec?ģ) On reusing the developer. What are your feedback on this? Has anybody tried cooler setup?Ģ) on agitation, Tetenal instructions are for rotary tank however Fuji hunt instructions which are the exact timings are for small tanks. So now I’m thinking 30C only because it is more controllable is I cant adjust 03:15 and subsequent timings for each batch that precisely however adjusting 08:00, 09:00, and so forth for each batch is more doable. However Tetenal has also development scheme for 30C. So I’m thinking to start to develop my C41 at home and use Tetenac Colortec kit and some Kodak Gold films to try with 10 or so.ġ) I know C41 is very sensitive on temperature and it is 38C.
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