Assertion: disc | /r/HasProperty | pressed in shellac
Facets:
value: normally
type: DEGREE
Source sentences:
text: The 10-inch discs, mostly used for popular and light classical music, were normally pressed in shellac, but the 12-inch discs, mostly used for "serious" classical music, were normally pressed in Victor's new vinyl-based Victrolac compound, which provided a much quieter playing surface.