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Look to verbatim ultralife gold archival grade dvd-r media to preserve your family photos & home movies as well as critical corporate data. Each disc is manufactured using proprietary unique dual reflective layers to maximize both compatibility & longevity. To further extend media lifetime, verbatim ultralife dvds contain a hard coating on the recording side to protect the discs from scratches.verbatim's proprietary dual reflective layer technology is comprised of a silver layer for broad compatibility & a gold layer for long archival life. The highly reflective silver layer allows the ultralife dvd-r disc to look like a standard silver disc to dvd drives & recorders. This feature provides a low initial error rate after recording, important for long archival life, & the same drive readwrite compatibility as standard silver-only discs. The gold reflective layer, naturally resistant to corrosion, prevents oxygen from coming through the dvd bonding material & corroding the silver reflective layer. Silver oxidation can be a primary factor which limits the lifetime of dvd media.the combination of mkm's patented metal azo dvd recording dye, revolutionary dual reflective layer technology & proprietary hard coating enables verbatim ultralife archival-grade dvd-r discs to deliver new levels in longevity & performance without sacrificing compatibility. These discs are built to last as long as 100 years (environmental control is required to prevent damaging conditions).