Okay- Here goes.
First off- what are you trying to get developed? Is it the Fuji Realaor the TMax 400? The Tmax like most B&W films none of the 1-Hour places will be able to do anything but send it off regardless if it's 120 or 35mm. Plus that takes weeks and is expensive- but you can develop it yourself and it's not too complicated or expensive. The Fuji is a C-41 process so I have no idea how to do it yourself but I have heard it is way more complicated and picky than B&W is. That is what I found a 1-Hour lab that will do for $1.60 a roll but maybe I just got lucky.
Anyway- to develop my own B&W here is what I have:
In addition to this I also spent maybe another $30 in the kitchen section of Wal-Mart for the folowing:
- Four 1 QT Tupperware drink containers to mix the chemicals in since they can be reused several times
- A digital thermometer since processing time varies according to temperature
- A digital kitchen timer to time the steps,
- A couple measuring devices that measure in ML from the small syringe style to larger ones for measuring say 800ML of water
- A bottle opener if you want to open a can of 35mm film
- A couple small magnetic 'chip-clips' to hang the film up to dry
- A plastic tub to keep it all in
As for the process:
- Mix up the four chemicals in the 1 QT containers according to the instructions on the labels. Mix enough to pretty much fill the containers since air degrades the shelf life. And remember to label the bottles.
- Working in the changing bag- load the film onto the reel, put the reel into the tank, and seal the lid. 120 film has a paper back which must be removed before loading on the reel. It is probably worth wasting a new roll of film to practice this where you can see a few times first.
- Check the temperature of the chemicals- particularly the developer. The book has time tables for temps from 65F-75F if it is warmer than that it will need to cool off in the fridge first.
- Pour the chemicals in and out of the tank following the tables in the book for times- Developer- Stop Bath- Fixer- Rinse with water- Photo-Flo right before you pull it off the reel. You will need to knock the tank at the start of each and agitate as instructed for your film (5x every 30 seconds for TMAx)
And that's about it- the film is safe for light when you do the water rinse. The Photo-Flo is just so it dries without streaks. Again there are a lot of videos on Youtube on film developing if you go look. 35mm is easier to load on the reel and the reel in the tank kit I linked to is 'convertible' to either format. The tank holds two reels in the 35mm position so if you think you may want to do that one day you can pick up a spare reel for like $10. Also- I think B&H will not ship the Stop Bath. I picked up all my chemistry at a local photography shop.
Anyway- good luck and have fun. This thread is like a Visa commercial
Plastic Camera: $40
Flatbed Scanner: $150
Film Developing Setup: $200
A little square B&W negative you made yourself: Priceless