Developing Colour Film at Home Without a Rotary Processor
For years I sent every colour roll to a lab and developed only black and white myself. Prices went up, the nearest decent lab closed, and I finally bought a C-41 kit. After about thirty rolls, here is what I wish I had known on day one.
Temperature is the whole game
The developer wants 38 °C, give or take a quarter of a degree. Everything else is forgiving by comparison. I use a plastic storage box as a water bath, an aquarium heater, and a cheap probe thermometer that I checked against a medical one. The tank sits in the bath between inversions, and I pre-warm it with water for five minutes before pouring the developer.
| Step | Time | Temperature |
|---|---|---|
| Pre-wash | 5:00 | 38 °C |
| Developer | 3:15 | 38 °C |
| Blix | 6:30 | 35–38 °C |
| Wash | 3:00 | running, warm |
| Stabiliser | 1:00 | room |
These are the times from my kit's sheet for fresh chemistry. Developer time goes up with every roll you push through it, so keep a small log taped to the bottle.
Agitation
Four gentle inversions in the first ten seconds, then two every thirty seconds. Banging the tank on the counter after each cycle gets rid of air bubbles on the film, which otherwise show up as small dark dots on the scans.
Drying
A hot shower run for a minute beforehand settles the dust in the bathroom. Hang the film with a clip at the bottom, close the door, and do not touch it for three hours. Every time I got impatient, I paid for it in retouching.