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 measured how much light eight black permanent markers absorb, from Sharpie to Japanese favorites like Magic Ink and Mackee. A matte paint marker won by a wide margin. Full results, why matte beats glossy, and how to get an even deeper black.

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.