...Kodak's CD-R, which, through accelerated aging tests, is now said to have an archival life of 267 years.
Now that's impressive.
As BOAC pointed out, brand names can be a trap. It's better to seek out the manufacturer ID. I use the free Nero DiscSpeed
I fell into the trap of buying Kodak branded DVDs. These were actually UME discs, a poor make. 3 of 5 failed.
Some respected makers of optical discs are Taiyo Yuden, Mitsui and Mitsubishi. I have managed to get Taiyo Yuden CDRs, branded as Maxell, in colourful polka dot packs, from WH Smiths. There are other Maxell packs which contain inferior discs.
Further information is here ...also just found this
In the UK, online retailer SVP makes a point of listing the manufacturer ID.