How is a record made?
During recording, the sound waves
created by the performer are engraved into a recording material with a
stylus.The workers at record-making companies then produce copies from those
templates in galvanic baths. Ever since 1922 this has been done on the
father-mother-son principle. The father is a negative copy of the master
template, the mother is a positive copy, and then the son-negative, copied in
turn from the mother (and also known as a “stamper”), becomes the matrix for
producing the discs. Since 1897, discs had been made of a mixture of shellac, stone
dust, cotton fibres and carbon black. From the second half of the 1950s onwards,
polyvinyl chloride(PVC) – vinyl for short – was used as the basic material for
records. The prepared material is put in a press, where printing is carried out
using two matrices. Then random testing is carried out on the records before
they are packed and dispatched.