by ks45 »
Sat Jan 05, 2008 10:22 pm
STYRENE.. Styrene (properly, Polystyrene).
Hard, relatively inflexible plastic used to press records, mainly 7-inch
singles, mainly using the Injection Moulding process. The material is heated
to a liquid form and is then squirted or injected into the closed stampers
in the press. This requires that the labels be either glued or painted on
after the record leaves the press. The cost savings to the manufacturer
comes from the extended life of the stampers because of the lack of a
heating cycle to the stampers. The material can also be reused without
noticeable change to its moulding properties. Styrene records will therefore
usually have very quiet surfaces when found in an UNPLAYED Mint condition,
but unfortunately they will wear to a noisy condition rapidly, especially if
played with a bad stylus or an improperly tracking tonearm. They also are
more prone to Cue Burn. The Columbia Records Pittman, New Jersey pressing
plant was once the major source of Injection Moulded Styrene pressings, and
pressings from this plant are found on MANY small labels. Look for the
glued-on labels. Painted-on labels can be found on records from the
Amy/Bell/Mala group. Apparently, Styrene was developed in the early 1950s in America, and was seen as a cheaper material for pressing records. The main producers of styrene at this time were labels under the Columbia group (Okeh, Columbia, Epic etc). During the late