[hawaiian bam bam]

Hello,
I finally found samples of a question I asked previously. This is what I mean (PHOTOS BELOW) In regards to factory certified autographs from Topps (Pack pulled) fade over time. the blue sharpie turns to a purplish grayish color and then fades like these examples below. Cards I had were keep out of the sunlight, in fact some where in boxes in the dark and never saw sunlight for over 10 years and still faded like these/ even when out there was very little light exposure, so i ask, does certified topps autographs fade over time and why do they fade like this when they were not in lighting or sunlight? maybe topps uses cheap sharpies to sign cards?