Optical discs are the ideal solution for long-term, secure storage of your important files - ideal for your precious photos, videos and documents that you want to keep forever. Not only are they dust and water resistant, but they can also withstand wide fluctuations in temperature and humidity. The double/dual recording layer was made possible by creating a new... substrate layer that is sandwiched between each recording layer. This allows the laser beam to record on both layers. When the first layer has been written, the laser writes to the second layer. 8.5GB capacity on a single disc! Verbatim printable discs have a surface that can be printed on with an inkjet printer. This allows you to customise the entire surface of the disc using selectable designs.