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May 25, 2017 at 10:33 comment added Jindra Lacko depends on what you call research - the B&W emulsions and paper developers are pretty mature. There is some research going on environmental issues - replacing chemicals which fall foul of environmental regulations. Cadmium salts are a nice example. Or using existing emulsions on new paper substrates - such as this one from Foma macodirect.de/en/rarities/5706/…
May 24, 2017 at 18:03 comment added Alaska Man Great answer but it does it speak to the OP's question of digital prints that are scanned from a negative and not edited? I believe that there is still R&D being done on Black and White paper.
May 24, 2017 at 14:29 comment added bvy "No one is investing any money in chemical-based paper print research " Can you provide a source, please?
May 24, 2017 at 13:57 vote accept FarO
May 24, 2017 at 0:28 comment added Alan Marcus @ Michael Clark - The space between my ears is likely jet black. I should have used the term Dmax for both paper and film. The CMY dyes should overlap to make a neutral deep black. They don't mainly due to the cyan and magenta being off color. Inks and pigments can and do improve add the key color black and you get a good Dmax.
May 24, 2017 at 0:00 comment added Michael C @AlanMarcus Not much in the universe that is this side of a black hole's event horizon is totally void of light.
May 23, 2017 at 23:17 comment added Alan Marcus @ OlafM - The tonal range of chemical color paper is 256:1 achieved only if everything is done to specifications. This only happens with due diligence. Digital prints on paper can and often exceed. @ Michel Clark - I was talking about prints that are comprised of dye. The max black of photo film is about 4.00 density units except X-ray that is coated both sides. The Max black of chemical silver based prints is about 2.50 density. This will look like jet black but it is not void of light.
May 23, 2017 at 21:53 comment added Michael C @Alan Marcus - "... a jet black has never been achieved." Are you referencing only color printing papers? Or also monochrome/B&W chemical photo papers?
May 23, 2017 at 21:46 comment added FarO Good answer. The beauty is in the eye of the beholder, but I was asking implicitly about attainable quality/technical specifications (as you pointed out citing tonal range).
May 23, 2017 at 20:58 history answered Alan Marcus CC BY-SA 3.0