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35mm_film_development_c41

Introduction

I recently started doing Color (C41 process) film development at home. This page is primarily for my own note keeping. I have more experience and better documentation with the B&W process.

I use a 290ml tank, but use 500ml bottles of working solution since the kit I use gives recipes for 1L and I just half everything. Double everything below to make 1L of working solution.

After use, I keep all used chemicals so they can be used later. I remove as much excess air as possible from my developer.

Chemicals

I used a Bellini C41 Kit (KITC41/1) which includes the following:

Developer (concentrate)

I diluted 130ml concentrate with 370ml water.

Bleach (ready to use)

The bleach is ready to use. I poured out 500ml into my own container for easier use, and to heat it as part of the process.

Fixer (concentrate)

50:50 ratio, so I used 250ml fix and 250ml water.

Stabilizer (concentrate)

This looks, acts, and smells just like my Adox Adoflo II wetting agent. Although it is called stabilizer, I suspect it is only wetting agent and nothing special. I don't generally measure this out, I just guesstimate approximately 5ml straight into the tank and then add water. I've never had any unexpected affects doing it this way.

Process

This is what I did, which is almost identical to what the C41 standardized process calls for:

  • Prewash with 38-40 Celsius water for 3 minutes. (good for bringing the tank up to temperature too)
  • Developer for 3m15s at 38 Celsius.
  • Bleach for 45 seconds at 38 Celsius (32-38C should be ok)
  • Fixer for 1m30s at 38 Celsius (32-38C should be ok)
  • Rinse with water for around 1 minute, (temperature and time probably not strict), aim for 32-38C
  • Stabilizer/wetting agent for 1-3 minutes at 30-38 Celsius (probably not strict at all)

Results

Will fill this section in later :)

Kodak UltraMax 24/400ISO, shot at 400ISO, 14-10-2024: 3m45s Dev, 1m30s bleach, 2m20s fix. Temperature regulation not strict, likely had ~1 Celsius differentials over the process, with +/- 1,5 Celsius inaccuracies in measurements.

35mm_film_development_c41.txt · Last modified: 2024/10/14 20:25 by joseph