My Vitamin-C powder came in… also known as ascorbic acid. Looking at the jar I figured this would last forever. Well not quite, I’ve bene doing a few calculations on the cost of Caffenol. Now there are a few recipes for Caffenol out there but I will be working with one called Caffenol-C-M. Let’s do math together!
Estimate based on preparing one litre of Caffenol per roll of film.
Ascorbic Acid 500 grams $34.64 – 31 Rolls of Film @ $1.12 per litre
Sodium Carbonate 500 grams $7.27 – 9 Rolls of Film @ $0.81 per litre
Instant Coffee (Price varies depending on brand, do not buy decaffeinated) let’s calculate this based on one from Walmart since the one I bought at Save On was probably a little bit expensive. Maxwell House 200 grams $5.57 – 5 Rolls of Film @ $1.11 per litre
Distilled Water 5 Gallons (189 litres) $5.00 – 189 Rolls of Film @ $0.03 per litre
GRAND TOTAL PER LITRE OF CAFFENOL-C-M
Seems reasonable to me. Keep in mind you will need fixer as well which will be an added cost. Fixer can also be reused quite a few times, from what I read it sounds like a safe estimate for a batch of fixer is about 30 rolls of film.