"I would simply note that Audio Desk System recommends the application of BLACK to the outer edge of CDs. I have done blind listening comparisons with fellow audio enthusiasts utilizing a highly revealing system (Meridian 808.6, ARC Ref40/250SE, Magnepan20.7) with a clear consensus for black over blue/green."
I’m aware. They’re wrong IMHO. As I recall the CD treatment that’s been around forever - Auric Illuminator I and II - also recommends BLACK. I think they even give you free one. They’re wrong too. Now that you mention it, I’m not a big fan of blind listening tests. They don’t prove anything. Again IMHO. As I already pointed out the CD laser nominal wavelength is invisible at 780 nm. I know what you’re thinking - but BLACK absorbs ALL colors AND infrared light. 😀
