It is possible to develop film with coffee, here is a good tip!
This is a really cool method I have been experimenting with. It will give you characteristics similar to a cyanotype print. I heard you can get various color shifts depending on the film type used, based on film layer chemistry, but this is my experience thus far with Kodak Gold 100 and Longs Advantage 200 both expired. Another cool thing about doing this is that you can also scan the negatives as black and white and get great results. It’s like a two for one deal.
I would highly recommend using cheap film at first if you haven’t developed with coffee yet, but if you decide to use standard black and white processing chemicals then just go for it. I would also recommend using a 100 to 200 iso film because these processing times relate to that and change for higher iso.
How to do it:
If you are going to develop with coffee consider overexposing by one to two stops depending on your lighting conditions because the coffee developer will pull (underexpose) your shots, which I had to figure out the hard way. This can be done in regular b/w chemicals too if you prefer.