Record Finders has been in the record
dealer business since 1969 in Richmond, Virginia.
Our stock is in excess of one million records. Our
newsletter also called Record Finder has 10,000 readers
per month. We maintain a mailing list of over 70,000
record collectors.
Record Smith, dedicated to record
restoration and preservation of the forgotten
songs of the past 100 years. Walter Smith, former
owner of Record Finders and Memory Lane Records for
over 35 years, is dedicating this site to keeping
the music of the past alive and well. Let us know
of any areas in recorded music that you would like
to see featured or discussed on this site.
Your Website Should Be Here
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A
great example of how things get better with time is
the Record and the CD. 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 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
sourced hydrocarbon. Without this, the record would
be transparent and would show the dirt collected in
the grooves, the scratch marks and other damage to
both sides of the record. Carbon black also increases
the strength of the disc. Compact discs are made from
a 1.2 mm thick disc of polycarbonate plastic coated
with a much thinner layer of Super Purity Aluminium
(or rarely, gold, used for its data longevity, such
as in some limited-edition audiophile CDs) layer which
is protected by a film of lacquer. The lacquer can
be printed with a label. Common printing methods for
compact discs are silkscreening and offset printing.
CDs are available in two sizes. By far the most common
is 120 mm in diameter, with a 74-minute audio capacity
and a 650 MB data or an 80-minute audio capacity and
a 700 MB data. |
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