Recently I bought a 25 cakebox of Verbatims 16x DVD+R. These are 'Made in Japan' ones with id code YUDEN000T03. I have noticed that after burning these discs, the back of the disc looks different than when burning MCC004 discs (also Verbatim 16x DVD+R). Usually hen you burn a disc you can always see that on the back of the disc there is always a lighter layer where the data was actually burned. From my experience this lighter layer always has one consistent shade. But when burning YUDEN000T03 discs I notices that the are two different shades visible on the part of the discs where the data was burned.
Take a look at the attached images. Green and red lines mark the beginning and end of the lighter layer with the burned data. This looks fine on a MCC004 disc, but on the YUDEN disc you can see a switch of shades (marked with yellow line/arrows).
As I don't have a burner capable of checking errors I can't really say what's wrong. The data seems to read/copy just fine, so I'm wondering what this change of shades actually means (if anything) ?