[78-L] Glass based recordings

[Al Haug]

Instantaneous discs aren't really test *pressings*, since they aren't
pressed. But as tests, especially for music publishers, they were still
being used throughout the 60s, maybe even later, and of course for home
recording and airchecks, too.But I think most of them were aluminum based,
so I'm not really being very helpful here. I've seen quite a few of the
aluminum lacquers, even have a few in my collection, but I've never seen a
glass one. I have read that at least some of the pre-Atlantic Ray Charles
sides were cut in the studio on 16" glass transcriptions.
Does anyone know if they used glass discs in the mastering process?

2009/8/17 Malcolm Rockwell <malcolm at 78data.com>:
> ...which reminds me.
> I recently acquired an instantaneous recording (a test pressing) made in
> the 1950s on a glass based disc (lacquer on glass). It was my belief
> that the glass based disc went the way of all things in the late 1940s,
> just post WW2.
> Is this not so?
> Has anyone heard of these discs still being manufactured into the 50s?
> Mal
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