Lomography LomoChrome XR 100-400 35mm Color Negative Film, 36 Exposures, Purple, Single Pack Film Type: Color negative film Film Format: 135-36 cartridge (36 exposures, 35 mm) Sensitivity: ISO 400/27 degree Process: C-41 Storage Temperature: 68 deg.F / 20 deg.C or cooler (50 deg.F / 10 deg.C recommended)