You can do C-41 at home without collecting 16 rolls of film. I just read the Kodak Flexicolor bottles, regarding storage: Developer and bleach: store in a corrosion resistant container, with a corrosion resistant liner Fixer: keep cool No mention of refrigeration. Suggest you search for and read Kodak publications CIS-211 and Z-131. These are foundational pieces of C-41 documentation. Also go to Photrio and read everything posted by user Photo Engineer, a former Kodak color chemistry engineer.