From: Patent Tactics, George Brock-Nannestad
Stewart Goodeman wrote [quote]:
I know in 1943, when they recorded the Rodgers and Hart
> revival of "A Connecticut Yankee" they actually used glass.
----- just to avert any confusion: glass means that the disc that supported
the layer that the cut was made in was made of glass. The layer could have
been lacquer, or it could have been wax, both were used. It has been thought
that glass was a cheap substitute for aluminum that was the most used
material for lacquer mastering discs, due to other uses for aluminum during
the war. But in fact, the quality of the cut in glass-based discs was better
than for aluminum, because the surface of glass was much smoother.
This is very different from the use of glass in the manufacture of CDs; here
the pits are really represented in the glass as a stage of manufacture.