Oh please join in whenever! I'm definitely adding to this over years for whoever to stumble upon when they need it. This is a goldmine of info for this, ty for sharing! will have some vital info now
Oh please join in whenever! I'm definitely adding to this over years for whoever to stumble upon when they need it. This is a goldmine of info for this, ty for sharing! will have some vital info nowJumping into discussion out of nowherefrom what I have learned from Stefan Lange, a guy who reverse engineered the E6 formulas here https://www.photrio.com/forum/threads/e6-homebrew-chromebrew-warnig-longer-than-assumend.32721/ (starting from patent formulas of Fuji and Derek Watkins) the yellow-blue axis is controlled by the amount of potassium iodide while the magenta-green axis is controlled by the color developer pH [higher -> more green, lower -> more magenta]. Indeed, the pH can be raised with sodium hydroxide and lowered with acetic acid, but that's just for magenta-green. I think the yellow tint is acquired by changing the iodide content
Jumping into discussion out of nowherefrom what I have learned from Stefan Lange, a guy who reverse engineered the E6 formulas here https://www.photrio.com/forum/threads/e6-homebrew-chromebrew-warnig-longer-than-assumend.32721/ (starting from patent formulas of Fuji and Derek Watkins) the yellow-blue axis is controlled by the amount of potassium iodide while the magenta-green axis is controlled by the color developer pH [higher -> more green, lower -> more magenta]. Indeed, the pH can be raised with sodium hydroxide and lowered with acetic acid, but that's just for magenta-green. I think the yellow tint is acquired by changing the iodide content
From my lab days, running Kodak E6 chems, adding sodium hydroxide (alkali) to the color developer was used to keep the blue/yellow axis in check.
Based on that, my suspicion is that the Cinestill "T6" color developer is quite acidic to obtain blue results.
But standard E6 has a built in problem because of carryover of reversal bath
Jumping into discussion out of nowherefrom what I have learned from Stefan Lange, a guy who reverse engineered the E6 formulas here https://www.photrio.com/forum/threads/e6-homebrew-chromebrew-warnig-longer-than-assumend.32721/ (starting from patent formulas of Fuji and Derek Watkins) the yellow-blue axis is controlled by the amount of potassium iodide while the magenta-green axis is controlled by the color developer pH [higher -> more green, lower -> more magenta]. Indeed, the pH can be raised with sodium hydroxide and lowered with acetic acid, but that's just for magenta-green. I think the yellow tint is acquired by changing the iodide content
By citrazinic acid
So how the colors are changing if we increase the CZA amount?
It competes with magenta couplers
I'm taking a wild guess and say adding citrazinic acid will shift color to green / away from magenta...
Yup. There's a really good book abt homemade e6, but I can't attach it here as a file. https://fex.net/s/c8k0tzm . It's in russian, but as always, Google translate does a really good job
Using an online OCR and a document translator, I managed to extract 2 pages out of Shadrin's scanned book that was shared before by @LeoniD . I am attaching my PDF. I was interested in processing errors, that's why I spent time only on these pages.
The trannies are definitely dark by about one stop.
There also seems to be a color balance anomaly/problem/special-effect/whatever-you-want-to-call-it. The slides look abnormally blue to me!
It's Provia.
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