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Discussion in 'Color: Film, Paper, and Chemistry' started by EASmithV, Oct 19, 2009.
Would this even work?
What exactly would happen?
You will get a color negative image but it may have dye stability and hue issues because of different CD. RA4 paper is something like 5-6 stops more sensitive to blue than to red, so I think you should use a warming filter even when using incandescent lights. Red layer is on top and probably there is no UV filter, so attach a UV filter to lens.
Use a heavy red filter that would convert a tungsten film to daylight and also add about 50R. Expose at ISO 25 or less and then use regular RA chemistry! You will get a paper negative.
You can also get a positive print by cross processing in a first developer, stop, reexpose and then the regular RA process.
You have poor latitude so it's imperative to get good color balance in the negative. Anything off gets weird fast. C41 developer gives nothing with paper last time I tried.
And the spectral sensitization of RA-4 is not optimized for `the real world´, but for transmission of the image dyes of C-41 film.
Go to the reference in the other thread ongoing about this subject. The posted work of Bujor B. taken in-camera and reversal processed is quite striking.
I assume you mean this original source
Yes, but I referred all to the other thread here on APUG which has more discussion.
Bujor B. used a "cross" process that was similar to one I had devised back in that time frame and published on PN. It will yield quite good positive "prints" from in-camera exposure and prints from slides if done carefully.