MAM-A/Mitsui has tested their Gold reflective layer CD-Rs with their Mitsui dye, to withstand
    the full spectrum of light, same as the sun, for 100 continuous hours without damage.
    Using data from tests like these, industry standard guidelines predict that MAM Gold CD-R
    will last greater than 100 years! (In fact, if you extend the data, MAM-A predicts a lifetime of
    up to 300 years before failing at the Orange Book limit of 220 CPS)