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A CD is made from 1.2-millimetre (0.047 in) thick, polycarbonate plastic, and weighs 14–33 grams. [71] From the center outward, components are: the center spindle hole (15 mm), the first-transition area (clamping ring), the clamping area (stacking ring), the second-transition area (mirror band), the program (data) area, and the rim.
During glass mastering, glass is used as a substrate to hold the CD master image while it is created and processed; hence the name. Glass substrates, noticeably larger than a CD, are round plates of glass approximately 240 mm in diameter and 6 mm thick. [3] They often also have a small, steel hub on one side to facilitate handling. The ...
Acetates are usually made by dubbing from a master recording in another medium, such as magnetic tape.In the vinyl record manufacturing process, a lacquer master disc is cut and electroforming is used to make negative metal molds from it; certain molds are converted into stampers, can be used to press thousands of vinyl copies of the master.
The preservation of optical media is essential because it is a resource in libraries, and stores audio, video, and computer data. While optical discs are generally more reliable and durable than older media types, (magnetic tape, LPs and other records) environmental conditions and/or poor handling can result in lost information.
Most CD players in the late 1980s and early 1990s did not handle the Mini CD circular indentation and required the use of an adapter, or very careful placement of the CD in the exact middle of the tray. Not until after the major record labels discontinued them, did the CD Players start to have the 80 mm circular indentation as standard.
Key takeaways. A CD that requires no set minimum deposit can guarantee a high yield without needing to lock in a large amount of money. While many CDs require you to deposit $500 or much more ...
An optical disc is designed to support one of three recording types: read-only (such as CD and CD-ROM), recordable (write-once, like CD-R), or re-recordable (rewritable, like CD-RW). Write-once optical discs commonly have an organic dye (may also be a ( phthalocyanine ) azo dye , mainly used by Verbatim , or an oxonol dye, used by Fujifilm [ 4 ...
The 74:33 playing time of a CD, which is longer than the 22 minutes per side [95] [96] typical of long-playing (LP) vinyl albums, was often used to the CD's advantage during the early years when CDs and LPs vied for commercial sales. CDs would often be released with one or more bonus tracks, enticing consumers to buy the CD for the extra ...