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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 ...
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.
With only a few thousand copies ever made, the 12-count CD set has since become a collector’s dream. Brand new sets can easily sell for over $200 , with autographed sets commanding much more. 2.
Bombs on London recorded on an aluminum disc by the British Broadcasting Corporation in 1940 on display at the CBC Museum. In the field of audio recording, an aluminum disc (aluminium in the UK and elsewhere) is a phonograph (gramophone in the UK) record made of bare aluminum, a medium introduced in the late 1920s for making one-off recordings.
The CD jewel case is designed to carry a booklet, as well as to have panel inserts. These may be used to display album artwork, lyrics, photos, thank-yous, messages, biography, etc. [5] Because the CD jewel case is the standard, most commonly used CD case, it is much cheaper. The price of the CD jewel case usually ranges from $0.75 to $0.95.
But over the course of the 20th century, record shops sold the new formats that were developed, such as eight track tapes, compact cassettes and compact discs (CDs). Today, in the 21st century, record stores mainly sell CDs, vinyl records and, in some cases, DVDs of movies, TV shows, cartoons and concerts.
Collectables Records publishes the 'Priceless Collection' series of budget compilations. Many of the label's other releases combine the contents of two original LPs on a single CD. The company also manufactures multi-CD compilation box sets sold exclusively through retailers such as QVC, Costco and Sam's Club.
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.