The problem with Memorex blanks used to be (and may still be) that while they may burn OK initially, the disks tend to become partially or completely unreadable as soon as one year after burning.
I wonder why that would be. I can understand why initial recording of any disk might be a problem, due to a poor recording medium, but it seems strange that digital data itself would deteriorate. Could it be something else, like deterioration of visibility through the plastic, causing problems for the reader?
Would be interesting to know.
ryck