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Funny
record covers.
A record sleeve is the
outer covering of a vinyl recording. The sleeve is technically
the paper covering that is closest in contact to the surface
of the recording, as in "dust sleeve", "liner"
and "album liner". The term has come to be synonmous
with "record jacket" and "album jacket",
which is the outermost cardboard covering of a vinyl LP.
The vinyl LP jacket and the 7"/12" sleeve are
the areas to receive considerable attention to graphic
design, and will contain the most important and pertininent
information about the recording (manufacturer, artist,
title of recording, and contents), assuming there is no
visible record label with such information. The term "album
liner" (or "record liner") led to the expression
"liner notes".
A gramophone record (also phonograph record, or simply
record) is an analogue sound storage medium consisting
of a flat disc with an inscribed modulated spiral groove
starting near the periphery and ending near the center
of the disc. Gramophone records were the primary medium
used for commercial music reproduction for most of the
20th century. They replaced the phonograph cylinder as
the most popular recording medium in the 1900s, and although
they were supplanted in popularity in the late 1980s by
digital media, they continue to be manufactured and sold
as of 2008. Gramophone records remain the medium of choice
for some audiophiles, and specialist areas such as electronica.
The normal commercial disc is engraved with two sound
bearing concentric spiral grooves, one on each side of
the disc, running from the outside edge towards the centre.
Since the late 1910s, both sides of the record have been
used to carry the grooves. The recording is played back
by rotating the disc clockwise at a constant rotational
speed with a stylus (needle) placed in the groove, converting
the vibrations of the stylus into an electric signal (see
magnetic cartridge), and sending this signal through an
amplifier to loudspeakers.
The majority of records are pressed on black vinyl. The
colouring material used to blacken the transparent PVC
plastic mix is carbon black, the generic name for the
finely divided carbon particles produced by the incomplete
burning of a mineral oil based hydrocarbon. Carbon black
increases the strength of the disc and renders it opaque... |
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