HP BD-RDL 50GB White Inkjet Printable 6X Blu-ray double-layer recordable disc offers 50 gigabytes of write-once storage capacity. It records and playbacks high-definition video (HD), as well as storing large amounts of data. A double-layer Blu-ray disc can hold 50GB, which can be used to record over 4 hours of HDTV. Blu-ray uses a blue-violet laser to read and write data. The high quality white printable surface offers full-surface printing for high-resolution photo quality images. It is compatible with leading brand Blu-ray drives and ink-jet printers. HP, the inventor of the CD/DVD technology also the Blu-ray standards committee member offers high-quality, highly reliable qualified media.