pbpb
Hello! Does anyone here have more detailed information on the spectral sensitivity of Adox Nuance paper? I assume it is sensitive in the 380–500 nm range, like other fixed-gradation papers, but are there any more precise measurements available? In particular: is it possible to make enlargements on this paper even if you only use the spectral range >475 nm?
I’ll definitely test it myself and report back here. The background to my question is as follows: I’d like to enlarge photos developed in Finol on this paper, but unfortunately the stain density is too high, meaning the contrast of the negatives is too high for the G2 paper, even when using a soft paper developer (Separol Soft). I don’t want to tone down the density afterwards. But it occurred to me that I might be able to filter out the high-density spectral range during enlargement and then, in effect, enlarge using the pure silver density, which has a lower contrast than the shorter-wavelength blue spectral range. I measured the absorption spectrum of ADOX CHS50 after Finol development using a professional spectrophotometer. There is a plateau of high stain density at 350–450 nm, followed by a drop to the pure silver density at 500 nm. This means that enlargement might be possible in the 450–500 nm range, provided the paper still has sufficient speed here. In this case, one could easily achieve an enlargement with variable contrast on a fixed-grade paper by selecting suitable edge colour filters! I’ve never heard of this before, but in principle it should work.
Regards, Patrick
