The Kodak Color Negative C-41 Processing Kit is a complete set of liquid concentrates for colour negative film: developer, bleach, fixer and final rinse.
What it is for
The maker's own kit, from the company that invented the process. The concentrates dilute to either 2.5 or 5 litres of each solution, so one box stretches twice as far when you need less at a time. Two ways to work: one-shot, discarding after each film, or with separate working and replenisher solutions, which pays off in volume.
How to dilute it
Colour processing differs from black and white in one respect: temperature is not a recommendation but part of the recipe. C-41 developer works at 38 °C, and one degree off already shows in the colour. You need a thermostat or a water bath with a thermometer — colour chemistry does not work on kitchen approximation.
Storage
Sealed concentrate keeps well but dislikes air: the emptier the bottle, the faster it oxidises. Decant the remainder into a smaller bottle, or displace the air — that is what gets a concentrate to its last measure.
How it compares
The Fuji and JOBO kits sit beside it in the catalogue. Kodak is the most flexible in how you work, Fuji the simplest, JOBO built around rotary processing. If this is your first time, buy the one that matches your equipment.
