Darkroom Process Notes: Difference between revisions

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(Notes to be copied from the sheets in the darkroom next time I'm there -sen)
(Notes to be copied from the sheets in the darkroom next time I'm there -sen)


== Processes ==
= Processes =
* Tetenal Colortec C-41 86°F Process - First done 2015-02-15, no issues
== Tetenal Colortec C-41 86°F Process ==
** Make sure all chemistry is at 86°F before starting.
* First done 2015-02-15, no issues
* Mixed per chemical kit instructions
* Make sure all chemistry is at 86°F before starting.
* Timing
** 1min pre-rinse
** 1min pre-rinse
** 8min in CD
** 8min in CD
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** 1min soak in STAB
** 1min soak in STAB


== Homebrew Chemistry ==
= Homebrew Chemistry =
* Coffee-based Caffenol
== Coffee-based Caffenol ==
** Smells extremely bad, avoid doing this again until the darkroom has improved ventilation.
* Smells extremely bad, avoid doing this again until the darkroom has improved ventilation.
** First two 8x10 prints came out great, then there was an hour delay due to other things coming up, then we did two prints that were very dark and very low contrast no matter what we did. Unsure if it was the time delay causing the developer to break down, or that it was exhausted after two sheets.
* Tones the paper slightly sepia-like
* Green tea-based Caffenol
* First two 8x10 prints came out great, then there was an hour delay due to other things coming up, then we did two prints that were very dark and very low contrast no matter what we did. Unsure if it was the time delay causing the developer to break down, or that it was exhausted after two sheets.
** Worked great, doesn't smell nearly as bad as the coffee-based solution.
 
== Green tea-based Caffenol ==
* Worked great, doesn't smell nearly as bad as the coffee-based solution.
* Developed 5 sheets over an hour or so and no noticeable degradation over them.
* Despite looking like a green milkshake, doesn't noticably tone the paper at all.
* Recipe
** Part A
** Part A
*** 450ml 22°C water
*** 450ml 22°C water
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*** If you mix all the ingredients at once rather than as two parts, it's very hard to make the sodium carbonate dissolve
*** If you mix all the ingredients at once rather than as two parts, it's very hard to make the sodium carbonate dissolve
** Add 3 teaspoons of vitamin C
** Add 3 teaspoons of vitamin C
* Timing
** Development time on paper has been ~120s
** Development time on paper has been ~120s
** Not yet tested on film

Revision as of 17:06, 15 February 2015

Many notes about process live on paper sheets or the whiteboard in the darkroom itself, but more useful/long-term things will be copied here for future reference.

(Notes to be copied from the sheets in the darkroom next time I'm there -sen)

Processes

Tetenal Colortec C-41 86°F Process

  • First done 2015-02-15, no issues
  • Mixed per chemical kit instructions
  • Make sure all chemistry is at 86°F before starting.
  • Timing
    • 1min pre-rinse
    • 8min in CD
    • ~30s in stop bath
      • Not absolutely required, but extends the life of the BLIX
    • 6min in BLIX
    • 6min rinse in film washer
    • 1min soak in STAB

Homebrew Chemistry

Coffee-based Caffenol

  • Smells extremely bad, avoid doing this again until the darkroom has improved ventilation.
  • Tones the paper slightly sepia-like
  • First two 8x10 prints came out great, then there was an hour delay due to other things coming up, then we did two prints that were very dark and very low contrast no matter what we did. Unsure if it was the time delay causing the developer to break down, or that it was exhausted after two sheets.

Green tea-based Caffenol

  • Worked great, doesn't smell nearly as bad as the coffee-based solution.
  • Developed 5 sheets over an hour or so and no noticeable degradation over them.
  • Despite looking like a green milkshake, doesn't noticably tone the paper at all.
  • Recipe
    • Part A
      • 450ml 22°C water
      • 10 bags of green tea
      • Let steep for 15 minutes
    • Part B
      • 600ml 22°C water
      • 4 teaspoons of sodium carbonate
    • Mix parts A and B together
      • If you mix all the ingredients at once rather than as two parts, it's very hard to make the sodium carbonate dissolve
    • Add 3 teaspoons of vitamin C
  • Timing
    • Development time on paper has been ~120s
    • Not yet tested on film
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