When it comes to Caffenol and using a batch for more than one 120 film. I´ve tried that out with success already. I´ve now done it again, this time three films in succession, all from the same 530ml mix, and this time not adding any instant coffee, just adjusting to the development times somewhat. I´ve not yet scanned the first film (not that relevant to the subject of re-using Caffenol really), but I have scanned both films two and three. How did they come out? Perfectly OK in fact. I wouldn´t say that I could see any detrimental effects of using the batch for three 120 films at all. In the case of 135 films, a single batch of 530ml could be used for up to 6 rolls if need be. The reason for doing this is not that one would save money, or the environment for that matter, but time. Time is a much more important commodity.
Adding 5-10% development time for Caffenol-C-M has been suggested as a place to start. I opted to add a minute for each successive film, even if the films were different and required different development times to begin with. For Acros (normally 12 minutes) 1 minute added would equate to nearly 10%, whereas a minute for TMX (normally 14-18 minutes) would equate to 6-7%. To be honest I think that both films are rather tolerant of variations in the mix and timings, that it doesn´t matter much. Don´t quote me on that though, YMMV.
From film no. 2 (TMX, EI 100, @ 16+1 minutes):
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| Flexaret Va, TMX, EI 100, in re-used Caffenol-C-M, @ 16+1min |
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| Flexaret Va, TMX, EI 100, in re-used Caffenol-C-M, @ 16+1min |
From film no. 3 (Acros 100, EI 100, @ 12+2 minutes):
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| Ikonta w/Novar f4.5, Acros EI 100 in re-re-used Caffenol-C-M @ 12+2min |
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| Ikonta w/Novar f4.5, Acros EI 100 in re-re-used Caffenol-C-M @ 12+2min |
I've only had two runs of caffenol. Have not tried reusing it yet. But I do have a question: Can you used leftover chilled brewed coffee? The recipes always use instant coffee, but every now and then I do have some left over brewed coffee, and if I can use it I would rather not pour it down the drain.
ReplyDeleteNever tried. But I suspect not, not unless you condense it considerably. The instant coffee brew used in Caffenol is way stronger than anything you would consider drinking.
ReplyDeleteI read your earlier post about mixing a larger batch of each component. As I read this, I assume you are mixing the three,coffee, vit-c and soda each in its own water to make 2L. Then at the point of using them, you combine 1/3rd of each mixture to make 500ml Is that correct?
ReplyDeleteHi Rick
ReplyDeleteSorry for the late reply. Yes that is correct. That is why each is mixed at triple strength so when combined 1/3 each they attain the correct concentration. In all I get 6 litres of developer.