Warning: Some posts on this platform may contain adult material intended for mature audiences only. Viewer discretion is advised. By clicking ‘Continue’, you confirm that you are 18 years or older and consent to viewing explicit content.
CD-R is written in an organic-dye, which deteriorates ( I’ve read the AZO chemistry is more enduring )
CD-RW is written in the crystallization of a metal layer.
CD-RW is permanent record, unless you heat them, or blank them, or overwrite/rewrite them: chemical-deterioration isn’t a problem.
I learned this with backups, many many years ago.
I’ve no idea if DVD-RW discs also are recorded in a eutectic metal layer, but they’ve multiple record-layers ( 2? ), and I’m don’t know how you can make a eutectic-metal layer that is transparent-enough to get through/past it to write the next layer,
I have, incidentally. Not on purpose: My father rearranged a room whilst I was away, putting the entire disc collection on the north-west-facing wall of the house. Bookcase heated and cooked the lot in the afternoon summer sun that January. He was upset when I explained why nothing worked any more.
CD-R is written in an organic-dye, which deteriorates ( I’ve read the AZO chemistry is more enduring )
CD-RW is written in the crystallization of a metal layer.
CD-RW is permanent record, unless you heat them, or blank them, or overwrite/rewrite them: chemical-deterioration isn’t a problem.
I learned this with backups, many many years ago.
I’ve no idea if DVD-RW discs also are recorded in a eutectic metal layer, but they’ve multiple record-layers ( 2? ), and I’m don’t know how you can make a eutectic-metal layer that is transparent-enough to get through/past it to write the next layer,
so I’ve no idea how permanent DVD-RW’s are.
I’ve lost data on the -R technology.
I’ve never lost data on the CD-RW technology.
I have, incidentally. Not on purpose: My father rearranged a room whilst I was away, putting the entire disc collection on the north-west-facing wall of the house. Bookcase heated and cooked the lot in the afternoon summer sun that January. He was upset when I explained why nothing worked any more.