> Agree, I was also mislead by the submission title, which has been changed from the original article title: "Optical Discs From Japan – Part 6: TDK UV Guard, Fuji, LG/Sony, Maxell, CMC"

I changed the original title, to express it's testing "new old stock" of DVD-R and CD-R 25 years later, as in "writing to these DVD-R and CD-R that were made a long time ago, and kept in their box".

Quoting from the article: "The Fuji did well even after all these years – it’s likely that disc is at least 25 years old. "

I think this is more informative than the original title, because there is not much interest in testing how to burn optical media (we have figured that out by how), while checking in great detail if OLD optical media can STILL be burned is very interesting!

I was captivated by the spectrometer test to check the UV protection, as I would expect that to be the #1 problem for data longevity testing.