Double/Dual Layer is a recordable disc providing 8.5GB capacity on a single side （2.6GB for 8cm discs）
The double/dual layer of recording has beenmAde possible by the creation of a new substrate layer that sits in between each recording layer
This allows the laser beam to record on both layers
Once the first layer has been recorded, the laser re-focused to record on the second layer
DVD+R is a recordable disc providing 4.7GB capacity
Compliant with the +RW-Alliance specifications AZO recording layer Highest Level of recording stability Compliant with the +RW Alliance （Double Layer） or DVD-Forum （Dual Layer） specifications Superior Archival life
