Then put in the strongest 455mm wavelength diode you can find off Digikey that fits the kit parts.

For instance "color-bleach" (which I guess is peroxide with other stuff) makes cloths disintegrate if used too often

When I lived overseas my laundry was often dried in the sun and it’s amazing how fast the color is bleached out.

They did test with UV light. The sun is broadband (it will have both blue light and uv light) so it works to a degree. The insight is that uv generates some new yellow coloured compounds and only using blue light prevents this.

Jokes aside, I suppose it's novel in the sense that it can be achieved with artificial _blue_ light.

My understanding was that it was various forms of UV from the sun that caused "bleaching", whereas the paper points out that it is not UV in this case, and in fact, the UV can cause additional staining.

EDIT: Edited for grammar.

445nm light isn't ionizing at any brightness, and shouldn't be catalyzing oxidation. Didn't look at it in detail but what is their claim on mechanism?

But this paper taught me something I had no idea about as a 33 year old. Also in the comment chain someone mentioned/brought up using peroxide/sunlight to clear up old yellowed plastics which is....monumental to some of my projects :)