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I had much more success today.., but by the looks of things I overdid the red re exposure and possibly the blue re exposure, leaving nothing for the magenta developer to actually develop. I can see the first hints of green in the grass, so maybe the yellow developer did work a little. I really have no clue haha. What does anyone think I should do to get more yellow and magenta in my image? Maybe reduce red and blue re exposure times and extend yellow and magenta times?
Like PE said, you need a colour chart.
I wanted to do this process also but did not have the time. I wanted to use 3 separate chromogenic developers also.
I have >50 rolls of Kodachrome 25 in my fridge.
What I wanted to do is first trying step by step, developing just 1 (one!) colour at the beginning to evaluate the times for developing and re-exposure.
If you take a picture of the colour chart and then, let's say, just do the cyan-processing (and the red re-exposure), the result just should show the cyan parts of the picture, so NO magenta or yellow parts of the colour chart at all. Then the times would be right.
Repeating this just for the yellow colour (blue exposure) should show only the yellow parts of the picture. To verify the combination of both steps, you can combine the 2 sheets of film and look through. Then you should see all colours of the testchart containing all cyan, green and yellow tones.
A red colour of the chart should be yellow and a blue part should be cyan and a magenta part should be blank.
After finding out the times for these 2 steps, you can do the complete process and just add the white exposure for the remaining magenta layer.
If too many parts of your picture go to magenta after this, the process of cyan and yellow did not go to the end (unexposed and undeveloped parts of the cyan and/or yellow layers were left).
For re-exposure, I planed to use LED lightsource red and blue because those should have a narrow spectral bandwidth not to expose unwanted layers of the film.
Your example seems like your red exposure also exposed most of the other 2 layers. So your time was too long or your lightsource was not narrow-band.
I think it is important to do the single steps first. So doing 2 kinds of "colour separations" for cyan and yellow.
Then you see 3 important things:
1. is the re-exposing time correct?
2. is the re-exposing light affecting wrong layers?
3. is the developer creating enough dye or any dye at all in the selected layer, so the mixture of both gives a right combined colour like GREEN?
As developers, I wanted to use RA-4 developer with added couplers, like naphtol for cyan,3-Methyl-5-pyrazolone for magenta and ethylacetoacetate for yellow. I used this for chromogenic developing B/W-Film and it works great.
Joachim
I'm just not motivated to do the testing. I want someone else to perfect it so I can use it.
