Have you ever wondered how long C-41 color chemistry can actually last? Did you think the manufacturer's recommendations were a little too conservative? When its hard to buy the stuff in small quantities, this becomes an even larger problem.
What if I told you that it is actually possible to perform experiments, collect data, and prove that your chemistry is still good before running any real film through it?
Come with me, as I deep dive into the world of "process control" and actually attempt to tackle this problem with the same sorts of measurements and data analysis that a professional lab might use.
00:00 - Opening
00:08 - Introduction
01:51 - Materials & Equipment
03:27 - Processing Workflow
06:09 - Analyzing the Data
10:55 - Conclusions
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Kodak Publication Z-131, Chapter 5: Process Monitoring and Troubleshooting
https://imaging.kodakalaris.com/sites/uat/files/wysiwyg/pro/chemistry/z131.pdf
My C-41 Process Control Spreadsheet
https://docs.google.com/spreadsheets/d/1ldDaVR9u6PMzWi4i_NxVXaTkpwugg_qc0bF-Md_6XQM/
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Fuji C-41 X-Press Kit
https://www.freestylephoto.biz/660163-Fuji-C-41-X-Press-Kit-5-L-Processing-Kit
Fujifilm Process Control Strips For C-41
https://www.uniquephoto.com/cn-16-control-stip-for-c-41-50strips-15508174
CineStill TCS-1000
https://cinestillfilm.com/collections/tcs-temp/products/tcs-temperature-control-system-tcs-1000-immersion-circulator-thermostat-for-mixing-chemistry-and-precision-film-processing-at-home
Jobo CPP-3 Rotary Processor
https://www.catlabs.info/product/jobo-cpp3
Acurad Technical Services
http://www.acurad.net/
(These are the people to go to if you want a new calibration reference, or service/repair, for one of those old X-Rite densitometers.)
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Happy Haunts by Aaron Kenny (YouTube Music Library)
Long Stroll by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/)
Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100174
Artist: http://incompetech.com/
How It Began by Silent Partner (YouTube Music Library)