Free course · 8 steps · Several weeks, a roll or two for each process
Colour film from shooting to scanning
Choose and shoot colour film for the light you have, process colour negative and slide film at home, and scan the results.
For anyone who has developed black and white film at home. C-41 builds on that, and E-6 builds on C-41, so take the steps in order.
- Understand colour temperature, to do
- Choose a film for your subject, to do
- Develop colour negative at home, to do
- Diagnose colour negative problems, to do
- Decide whether to develop slides at home, to do
- Diagnose slide film problems, to do
- Cross-process a test roll, to do
- Scan colour film with a camera, to do
What you need
- Developing tank, reels and a changing bag
- A C-41 chemistry kit
- An accurate digital thermometer and a water bath or sous vide circulator
- An E-6 chemistry kit, for the slide film steps
- A digital camera, macro lens, even light source and film holder, for camera scanning
Safety
The safety data sheet from your kit maker covers the hazards of the chemicals in the kit.
Dispose of used chemistry according to the manufacturer's safety data sheet and your local council and water company rules.
Steps
1Understand colour temperature
Film has a fixed colour balance, so the light you shoot in decides the colour you get. Most colour film is balanced for daylight and shows a cast under tungsten, fluorescent light or shade.
Do this now
Use the colour temperature tool to compare common light sources, then think of the scenes you usually shoot and which would show a cast. For each, decide whether to filter it, correct it when scanning, or keep the cast.
Checkpoint: You can now predict the cast a light source will give on your film and choose how to handle it.
2Choose a film for your subject
Different subjects favour different films for grain, colour, contrast and speed. The guide offers starting points, not rules.
Do this now
Read the sections for the kind of pictures you take and pick a colour negative film for your first home-developed roll. If you plan to try slide film later, choose one for that too.
Checkpoint: You have chosen a colour film that suits your subject and your plans for processing.
3Develop colour negative at home
C-41 is the standard process for colour negative film, and every film uses the same times. The developer temperature is the critical part, so your thermometer and water bath matter most.
Do this now
Choose a kit, set up a water bath, and process a roll by the kit's instructions using the process timer. Wear nitrile gloves and eye protection, ventilate the room, read the safety data sheet supplied with your kit, and never eat or drink where you work.
Checkpoint: You can now process a roll of colour negative film at home with the temperature under control.
4Diagnose colour negative problems
Colour casts and density faults have recognisable causes, from developer temperature and exhausted chemistry to the light source or the scan. Working out which one you have comes before any fix.
Do this now
Look at your negatives for a cast across the whole roll, thin or dense frames and staining, and compare them with the guide. Decide whether the cause is processing, lighting or scanning before you change anything.
Checkpoint: You can now tell a processing fault from a lighting or scanning problem on a colour negative.
5Decide whether to develop slides at home
E-6 is a reversal process that makes a positive slide directly on the film, and it is more demanding than C-41. The first developer is the critical step, because it sets how dark or light the slides come out.
Do this now
Read the guide's temperature and kit sections and go ahead only if you can hold the first developer's temperature as tightly as your kit asks, running a short test clip before important film. If a lab suits you better, read this step and move on. Wear nitrile gloves and eye protection, ventilate the room and read your kit's safety data sheet, as the colour developer can cause skin allergy.
Checkpoint: You can now decide whether home E-6 suits you and, if so, how to run a slide film through it.
6Diagnose slide film problems
Slide film has little latitude, so exposure and first developer errors show directly in the final slide. Its colour balance is fixed, so filters at the time of shooting match the light.
Do this now
Compare your slides, or the symptoms in the guide if you have not processed any, with the faults for density, colour and uneven development. Note whether each one traces back to exposure, the first developer or the lighting.
Checkpoint: You can now trace a slide film fault to exposure, processing or lighting.
7Cross-process a test roll
Cross-processing runs film through the chemistry made for the other type, most often slide film in C-41. The results are unpredictable, so the guide advises a test roll first.
Do this now
Shoot a test roll of slide film with slight overexposure, never your irreplaceable pictures, and process it in C-41 at your kit's normal times. Wear gloves and ventilate as for any C-41 work, then scan it as a negative.
Checkpoint: You have cross-processed a test roll and noted how that film behaved.
8Scan colour film with a camera
Camera scanning photographs your negatives with a macro lens and an even light, then inverts them in software. The orange mask of colour negative is the hardest part to get right.
Do this now
Set the camera square to the film on a copy stand or tripod with the film held flat, and focus on the grain. Take a frame of the bare light for white balance, then invert your frames with the negative inverter or the software you prefer.
Checkpoint: You can now photograph a colour negative flat and in focus and invert it to a positive.