Verbatim BD-R SL 25GB 6x 5 Pack Jewel Case The advent of Blu-ray technology has led to the introduction of high capacity storage discs to meet the demand cause by the rapid growth of high definition television (HDTV). Key Features Hard Coat protective layer Extremely long archival life Excellent playback performance BD-R is for use in BD drives & recorders Laser Wavelength: 205nm The advent of Blu-ray technology has led to the introduction of high capacity storage discs to meet the demand cause by the rapid growth of high definition television (HDTV). Blu-ray discs get their name from blue laser technology. The shorter wavelength of the laser is the reason it is blue in color. The blue laser has a wavelength of 405nm compared with the wavelength of 650nm for DVD which utilizes red laser technology. The benefit of having a blue laser with a shorter wavelength means it is possible to write smaller data pits & therefore vastly increase the amount of data on the disc. Blu-ray discs offer 3 to 5 times the storage capacity of a standard recordable DVD disc, enabling the recording, rewriting & playback of high definition video (HD).