A dubplate is an acetate disc usually of 10 inches diameter, traditionally used by studios to test recordings prior to mastering for the subsequent pressing of a vinyl record, but pioneered by reggae
Acetate disc
…An acetate disc (also known as a lacquer, test acetate, dubplate, or transcription disc) is a type of phonograph record generally used from the 1930s to the late 1950s for recording and broadcast purposes. Lacquer-coated…