newer MAM-A Mitsui media
What do you mean newer
? Do you mean MAM-A labeled on the hub?
I use the silver, and the blue color of the TY makes it aversive for my use. That said, an interesting thing is that when you use CD Speed or anything to check the Disc Info, all of my discs say "Mitsui" - that is, when read by software. But there's a MAM-A brand on the hub.
I have been curious if the spin off of MAM from Mitsui resulted in any production differences, and thus may be the cause of some of the recent problems. I currently cannot burn the 52x media, reliably, faster than 16x, on a new 52x drive.
So I'm supremely curious what discs you have and why you're calling them newer. I am using 100 packs of unbranded laquer finish. And for whatever it may be worth, it seems like there's a boatload of part numbers for the same media. I'm not sure if that's packaging related or something else.
The medical grade CDRs are of no interest to me personally. I've had great luck, until recently with the Silver, although the drive I'm using is new, and I now know I have a media quality issue, so I've never actually burned at anything approximating 52x. The older burner was a 20x drive so even with 24x media, 20 worked fine.
In any event, I'll be interested in your review... I'm working on an SOP to QC media when they come in our door. When it's finished, and I can rely on it, I'll post it here for folks to tear apart or add to it.