>development of a standard for professional-use next-generation optical discs -- > dust-resistance and water-resistance, and can also withstand changes in tempe

>development of a standard for professional-use next-generation optical discs -- > dust-resistance and water-resistance, and can also withstand changes in temperature and humidity when stored. So it's a new standard with tougher physical requirements. Actually in a japanese press release [1] they present at the end the current archival solution offered by Sony, which consist of a set of 12 optical discs in a cartridge. I'd image this new disc standard could be sealed as well for better protection. [1] http://www.sony.co.jp/SonyInfo/News/Press/201307/13-0729/ http://www.sony.co.jp/SonyInfo/News/Press/201307/13-0729/