Amberol Records were a type of phonograph cylinder, introduced in 1908 by Edison Records. They were successor to the Gold Moulded Record, and by doubling the number of grooves to 200 threads per inch, Amberol Records doubled the playing time to 4 minutes.
The wax used in Amberols was a harder compound than previously and this new compound also began to be used in Gold Moulded Records at the same time. The process of making Amberol Records was the same, using a gold-coated mould made from a master cylinder, and like Gold Moulded Records, ran at 160 RPM.
Machines designed to play the older cylinders had to be modified to play Amberol Records, and phonographs were introduced in 1909 that could play either by moving a switch.
Although Amberol Records increased interest in cylinder records, there were problems as they cracked easily, could shatter during playback, and wore out rather quickly. Amberol Records were replaced in 1912 by Blue Amberol Records that used a different formulation (celluloid reinforced with a plaster of Paris core) to overcome some of these problems.
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