I really haven't touched caffenol since the summer of 2020, but now I'm thinking about trying it again in the distant future to develop some more expired Kodachrome. the thing is, I've still got the same ingredients from four years ago, but I don't think they'd be useful anymore... or would they? what do you all think?
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Coffee Developers
"chemistry" expiration
#1 #2 If nothing's mixed or in a liquid form, I'd think they'd all still be worth a running a test roll. I should think anything mixed would be long worthless.
A bit off track, I tried Caffenol mixes back in 2018-2019, but concluded if I'm going to this trouble, I might as well mix D23 that has fewer ingredients, or something else with up to 4 or so, but more reliable results. For my blood as a non-chemist, the Caffenol process resulted in a strong appreciation for the consistency of known chemicals from defined sources and a slew of experience and expertise involved in their confection. YMMV.
Sadly, while Steve at "Figitalrevolution" produces solid, admirable work using caffenol, the bulk of folks seem more like Lomography's vibe of "if it's bad it must be good" and so tend to associate Caffenol with just bad photography, bad development and/or both. These are NOT the folks using Caffenol on photrio, but what I found a lot examples of back at the time.#3 good news is, nothing's been mixed- it's all still a concentrate#5
My experience is that it is pretty much consistent, provided that people use metric values and drop the teaspoons, tablespoons and god knows what strange imperial units exists.
Also, the sourcing of the materials, perhaps especially the coffee and soda must be correct, I am sure there are thousands of alternatives here.
When I stuck to the same formula, with the same ingredients, all my films came out perfectly fine.#6 If you use a Caffenol with vitamin C, you should be fine as most of the image is made by it anyway, so a slow coffee deterioration may only show as a slight decrease in negative density. This is what I recently observed with components sourced in 2018. But the image made only by vitamin C is relatively contrasty, so if the coffee component is totally gone, you will not like what you get.#7 ok, the test roll's been shot and I'm ready to develop it- what times to you recommend for Ilford Delta 100?#8 so my old jar of coffee dried out, but fortunately I had a spare I'd never opened- just dropping some excess leaders from previous 35mm films into a 400ml mixture (5tsp coffee, .5 VCm 3.5 WS), and it seems to be working.
after doing my own research, would 8-9 minutes work for delta 100?
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