I can't find the previous HN discussion, but there was a bit of a rivalry between Stuart Semple and Anish Kapoor over who could create the blackest black paint:

I can't find the previous HN discussion, but there was a bit of a rivalry between Stuart Semple and Anish Kapoor over who could create the blackest black paint: https://creators.vice.com/en_us/article/ezw8wp/mattest-flattest-black-acrylic-paint-anish-kapoor https://creators.vice.com/en_us/article/ezw8wp/mattest-flatt...