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The CD-R named CD Write-Once (WO) in 1988, specification was first published by Sony and Philips. The media also was named at that time Write-Once (WO) but then later on changed to the CD-R as we all know it. Media or blanks CD-R media are the disks that are used to record digital information, this process of recording is done by using a special recorder and premastering software with a computer. These discs are made of a polycarbonate substrate, a metalized reflective layer , a layer of organic dye, and a coating of lacquer for protection. Injection Molding This is a manufacturing method where the molten material is forced into a mold, this is normally done under high pressure, then after a while is cooled so that the material will take on the shape of a mirror image in the mold. Organic dye The data layer of CD-R(Or recordable Disk) media is made from a dye that is melted during the recording process . The area where the Dye has been melted, becomes refractive or opaque, scattering the reading laser so that it isn't reflected back into the reading sensors. Data layer With CD-R media, this is the organic dye that is squizzed or sandwiched between the polycarbonate substrate and the metalized reflective layer of the media. No data will be found on a CD-R disk until it's first burning process. Reflective layer This is the metal layer that sits on top of the dye, this layer finally reflects the laser beam back to the reading assembly. This is normally 24k gold in CD-R disks, but sometime it can also be made of silver.
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