The power of coffee

I just finished scanning negatives developed in “coffee”...certainly not the one I am drinking at the moment ;)
Caffenol is a home made film developer based on instant coffee (NOT decaf). Very new and exciting experiment even if such a way of developing is well known since while. I bought all ingredients after very short online research. I've had a some trouble finding washing soda but got it on ebay at last. Here i need to point very halpful websites: Caffenol blog and Maciek Lesniak Fotografia (in polish). Good set of information!

instant coffee, pure vitamin C powder, washing soda

Caffenol, once mixed is supposed to be used within half an hour. Storage is not recommended.  Well I didn't test it so far but I have to trust the experience of others.
I am using Paterson dev tank which holds 0.5 l of dilution for one 120 film so my proportions (for 0.5L dev) are as follows:

- 27g of washing soda
- 8g of vitamin C
- 20g of instant coffee

This gives me Caffenol-C-M - for medium fast film. Tested here on Ilford Pan F Plus 50 and Ilford FP4+ 125.
Recommended dev - 15min, 20°C.
Proportions are adjustable depending obviously on quantity needed.

ready developer, Caffenol-C-M

It rather smells bad (maybe because of instant coffee which is obviously a fake one ;D haha) and makes quite a mess when spilled. Dilution however is very easy to prepare, extremely cheap, very efficient and gives just wonderful results. Beside that it’s quite flexible. Usually I have to be careful with average developer. Sometimes 2° or 3°C makes a huge difference, even in tolerant black and white negatives. The same with proportions. During my tests I developed two different films in developer mixed in the same way, with the same time and almost the same temperature. I am a bit impatient so I decided to go with a few degrees warmer dilution (warmer water makes everything easier to mix) and 1 min shorter dev time then recommended (Pan F Plus 50 - 14min, 22°C, FP4+ 14min 23°C). Stop bath and fixing is exactly the same as with ordinary developer.
I must admit I am more then happy with the results.
Looks like I am gonna remove all other developers from my monthly (photo) shopping list.
So now just a few random photographs as a proof of my words:

Yashica Mat-124G with Yashinon 80mm 3.5,
Ilford Pan F Plus 50 in Caffenol-C-M 14min, 22°C

Yashica Mat-124G with Yashinon 80mm 3.5,
Ilford Pan F Plus 50 in Caffenol-C-M 14min, 22°C

Hasselblad 500C/M with Planar 80mm T* CF 2.8,
Ilford FP4+ in Caffenol-C-M 14min, 23°C