Caption:

'The Lass With The Delicate Airs' and other songs performed by Evelyn Knight, recorded on a 'Long-Playing Unbreakable Microgroove Record' on the Brunswick label. Vinyl copolymer (polyvinylchloride(PVC)) records have been produced commercially in Britain since the 1950s. Earlier LPs were made of other plastics such as Bakelite and shellac. The advantages of vinyl records those made from these earlier materials were that they were lighter, less brittle, and were cheap and easy to produce, making mass production possible. Problems of sound quality, ease of damage by scratching, and warping of records when exposed to heat were prominent factors in the decline of vinyl from the 1980s, and its replacement by polycarbonate compact discs (CDs).