Black anodized aluminum looks matte black, but in the near-infrared it reflects more than 80% of light. Here is what our measurements showed, and how a thin FINESHUT SP lining stops the resulting stray light.

We tested eight popular black permanent markers, including Sharpie, Tamiya, Pilot, and Zebra, by measuring how much light each one absorbs. See which marker delivered the deepest black and how Musou Black Paint compares.

Fineshut KIWAMI and Musou Black Paint are suppressing stray light inside the visible-light cameras of Japanese astronomical telescopes, helping researchers observe faint objects like Mira variable stars and supernovae.