Paper disc

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The paper disc is one of the formats chosen to succeed the DVD. Developed by Sony and Toppan Printing, the disc can be read by Sony's new Blu-ray Disc (BD) format and offers up to 25 GB of storage. It was officially announced on April 15, 2004.

Paper discs are made of 51% paper by weight. They are easy to cut up, making them easily disposable to preserve data security.

Basic structure of a paper disk is similar to the ordinary Blu-ray Disk. In a BD the recording layer on which the data is stored lies under a 0.1 millimeter protective layer and on top of a 1.1 millimeter thick substrate. The substrate, or basic surface on which a material adheres, is usually made of a polycarbonate plastic, but the new disc replaces this with paper. The result is a disc of which paper makes up approximately 51 percent of its weight, Sony says.

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Paper data storage media

Writing on Papyrus (c. 3000 BC) • Modern Paper (105 AD) 
Punched card (1725) • Punched tape (1846) • Book music (1863) • Piano roll (1880s) • Optical mark recognition (??) • Optical character recognition (1929) • Barcode (1948) • Paper disc (2004) 

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