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> or can you just leave it out in the sun for a couple weeks or something? I actually don't know if there's a good source for this, but I've heard that the yel
by jchw 1y ago
> or can you just leave it out in the sun for a couple weeks or something?
I actually don't know if there's a good source for this, but I've heard that the yellow discoloration caused by UV rays actually happens because of the specific way that window glass is filtering the UV spectrum unevenly; that would at least partly explain why retrobrighting, where you literally put things out in the sun or expose them to UV-C light directly, seems to actually work, and some people claim that even just leaving yellowed plastic out in the sun with no cover also works to an extent.
- wkat4242 1y agoUsually they leave it in the sun with retrobrite applied (which I believe is pretty much just hydrogen peroxide)
- jchw 1y agoYeah. I've done this a few times with plain old hydrogen peroxide. However, I also really do wonder if the hydrogen peroxide is even needed... it seems to help, but it's unclear. It's frustrating how unscientific retrobrighting is; it clearly works but it's so weirdly spotty that it's hard to conclude anything, with effort it usually works to some degree but when it does and doesn't work is a mystery (and people often mistake accidentally bleaching the parts for success, which muddies things even worse.)