The chemicals I use for developing colour film is the 2.5 litre tetenal C41 kit. This is a box of 6 bottles which you mix together to make up three solutions – developer, blix and stabilizer. One litre solution is said to be sufficient to develop 16-18 rolls of film but I normally do slightly fewer rolls than this.
How to develop expired film? Most of the time you can develop expired film normally, the same as you would with any regular roll of film. However you may come across an old film for which the intended development process is no longer available. Kodachrome is one well known example of this as it used the now defunct K-12 or K-14 processes. Being an ISO 400 film, it can handle most lighting conditions well. Here are some normal shots taken with the film. Credits: uncle_jay. However, the fun really begins when you turn this film into redscale and shoot it at various speeds. My favourite speed to shoot a redscale film made out of this expired roll of Kodak UltraMax 400 is ISO 50. Remember, perfect temperatures really aren’t necessary with stand development. Set your timer to sixty minutes and agitate your film ten inversions right off the bat. After thirty minutes or so do one inversion just to mix up the chemistry in the tank a little. After an hour, dump, fix, and wash. That’s it. Hhmb.