Search results
Results from the WOW.Com Content Network
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 ...
Mini CD-R, Mini CD-RW: As of 2020, many manufacturers offer 80 mm CD-R and CD-RW discs for sale in retail electronics and office supply stores. [citation needed] Most of the blank discs available in retail hold either 185 MB (21 minutes) or 210 MB (24 minutes) of data. The mini discs, despite having less weight and plastic, are generally more ...
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.
Most gold and platinum records are actually vinyl records which have been vacuum metallized and tinted, while trimmed and plated metal "masters", "mothers", or "stampers" (metal parts used for pressing records out of vinyl) were initially used. The music in the grooves on the record may not match the actual recording being awarded.
The VinylDisc is a combination of a digital layer, either in CD or DVD format, and an analog layer, which is a vinyl record, developed by the German company Optimal Media Production. It consists of a silver layer containing CD or DVD and a black polyvinyl chloride layer (able to hold 3.5 minutes of audio on 33⅓ rpm) which can be played on a ...
The Sri Lankan partners acquired the South Korean partner's stake partners in 2006. Sri Lankan conglomerate Hayleys acquired Alumex in 2010 and was listed on the Colombo Stock Exchange after an initial public offering in 2014. Alumex is the leading aluminium manufacturer in Sri Lanka, with a market share of 46%.
Vinyl, acetate, and shellac discs being exposed to soil and fungus spores. Library of Congress Study, 1959. The conservation and restoration of vinyl discs refers to the preventive measures taken to defend against damage and slow degradation, and to maintain fidelity of singles, 12" singles, EP’s, and LP’s in 45 or 33⅓ rpm 10" disc ...