Panasonic BD-R SL and DL Premium

Hello,
what do you think about these products?
Are they really archival grade BD?
Thank you!


Any information on their MID?

“mei-t02” (4x) “meira1” (6x)

The product are these:
https://panasonic.jp/media/p-db/LM-BR50LP20.html
https://panasonic.jp/media/p-db/LM-BR25LP20.html