Having just begun a thread about an acetate I found on YouTube, it has made me realise that I actually know next to nothing about acetates and their purpose back in the day. Can anyone shed light on the following:
1] did they come in different sizes? The one posted on YT contains about 3 or 4 tracks on each side, and was presumably 10 or 12", but I think there were also 7" acetates which were either single sided or double sided?
2] what were they made of? vinyl, shellac, metal?
3] how many? Was only one copy pressed, or a run?
4] what was their purpose? was it like having a handy disc to play at weekly quality control meetings, or did they have a wider purpose than that?
Any opinions welcomed.
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