100SPINDLE Archival Gold CDs with Scratch Armor Retail Pkg Patented Phthalocyanine dye formula that gives a storage life of 300 years. Gold is one of the most reflective robust elements on Earth. More than 20 of 24k gold in every CD-R. Maximum resistance to the harmful effects of oxidation, a main cause of failure to optical media. Scratch Armor's protective layer prevents scratches, scuffs, dirt, chemicals, and fingerprints