valdas
Veteran
I know that C41 colour development with Rollei Digibase has been discussed many times, but I still have some questions. I think it is due to the fact that the manufacturer instructions are not that clear and accurate (e.g. it does not indicate any wash need between bleach and fixing). My question is about the development compensation. User instructions gives 3 min 15 sec colour development time, but does not say anything about the time increase with each run. Say, I have 0.5l working solution where I can develop at least 10 rolls. I develop in my tank 2 rolls per each run, so what about first 2 rolls vs following 2 vs #5&6, vs #7&8, vs #9&10? So far I have not been using any compensation, results were OK, but...
Another question is about the agitation. Let's say for the colour development -instructions say: 15 sec of continuous agitation at start, then one agitation every 30 sec. I am puzzled here - how should it work for rotary tanks (say Jobo processor) where the agitation is continuous?
So far I developed more than 30 rolls (I have bought 5L kit). My results are mixed, but I am using exclusively expired film, so not sure if some colour shifts that I get at times are more attributed to the expired film or the imperfections of my process...
Another question is about the agitation. Let's say for the colour development -instructions say: 15 sec of continuous agitation at start, then one agitation every 30 sec. I am puzzled here - how should it work for rotary tanks (say Jobo processor) where the agitation is continuous?
So far I developed more than 30 rolls (I have bought 5L kit). My results are mixed, but I am using exclusively expired film, so not sure if some colour shifts that I get at times are more attributed to the expired film or the imperfections of my process...
Mablo
Well-known
For every 4th roll add 15 seconds more to the development time.
Continuous agitation is OK, it's actually better than intermittent agitation.
Note also that the instructions leaflet doesn't mention a 1 to 3mins wash between bleach and fixer and another 3 mins wash after fixer and before stabilizer.
Continuous agitation is OK, it's actually better than intermittent agitation.
Note also that the instructions leaflet doesn't mention a 1 to 3mins wash between bleach and fixer and another 3 mins wash after fixer and before stabilizer.
valdas
Veteran
Thanks!
I figured out this wash omission (based on my experience with E6 process), but now I have confirmed from different sources. And it is very useful info about the compensation. Yesterday I waisted one film (iso 800). Developer solution was quite old (maybe 5-6 weeks) and it was an 11th roll from the 0.5l solution (therefore, above the capacity limit as per instructions) and film came out very much underdeveloped. I still wonder if it is due to 1) old developer or 2) exhausted developer or 3) lack of compensation (it was 3 min 30 sec) or combination of all three factors...