Is there a way--that is cheap and not hugely complicated--to manually modify or even build an ICC profile? And by manually, I mean without a spectrophotometer (ColorMunki Photo or similar). In my specific case, I have a profile for the printer + ink + paper combination that produces pretty good results for black and white prints. However: (1) overall there’s a slight olive-green cast, which I figure with modifications to the individual R, G, and B and curves and some trial and error I can probably counteract; and (2) the deepest shadows are a bit crushed, i.e., there’s very little deep shadow detail. Instead of tweaking every image to counteract these issues, I’d rather develop a standardized way to make prints that look, subjectively to me, ‘right’. Obviously I could have a custom ICC profile made, but even if it is perfectly technically correct, that doesn’t necessarily replicate what looks right to my eyes.
If I do it as a curves adjustment in Lightroom or DxO PhotoLab or whatever, those adjustments don’t really translate to other software, may complicate other image-specific adjustments I’d like to make, and may be slightly laborious to make. On the other hand, if I modify an existing ICC profile or build a new one to get the prints I want, using it thereafter should work quickly and easily, regardless of software, without complicating other adjustments.
To be clear, I’m under no illusion that I can make color photos come out correctly through such a procedure. My ambition is limited to neutralizing B&W and opening the deepest shadows a bit.
So can you recommend a way to do this?