The blackest black paint ever

The blacker the better. 

I had an arts and crafts friend actually point me to this black coating.  I totally agree with Eric that not all black is created equal.  I had been trying to find a really good non-reflective coating for some wood boxes.  However, none of the finishes I tried really did what I wanted. 

The "clearbase" that iceageaudio tries to tell us is the only black is likely a combination of polyeurathane and a form of black dye.  This ends up being either gloss black or flat black.  Obviously, gloss black is highly reflective and ends up being very much like a mirror.  I have a B&W D3 speaker that i have to cover with a towel because it's piano black is so highly reflective that I am seeing a mirror image of my projected movie, lol.

The flat black paint I ended up going with still had a level of reflectivity which still caused problems because the box was so close to the edge of the screen - it was reflecting light from the screen.

This BLK 3.0 or Vanta Black type compound may have been the best solution, but at $22 for a small bottle, I was worried about how much I would have had to buy. lol.

Sorry, I posted the same link twice. What I meant to post was a 2019 article about MIT’s own research into the subject:

https://www.cnet.com/news/mit-unveils-new-blackest-black-material-and-makes-a-diamond-disappear/

What all these articles have in common is that while the reflected color spectrum may be the same across all true blacks, the total amount of reflected light is NOT.

What we called black in 2010 still had quite a bit of light reflectivity compared to the latest stealth blacks.

The most interesting black product I've seen was a projector screen Sony showed at CES one year, around 2002 or so.  The screen looked extremely dark in ordinary room light because it absorbed almost all light except the precise wavelength of the red green blue projection from a video projector.  I don't know if part of the trick involved the polarization of the light source as well as the wavelength.  It was quite amazing how vibrant the image looked under lighting that would have made any other front projection image look washed out.

I believe the Sony screen never made it to market.  It was supposedly very expensive to make, brittle (so the screen cannot roll up) and people hated the look of a big black screen on the wall (I guess they never considered some kind of cover or valance).