Also these new records were made of a vinyl compound rather than the easily breakable shellac of 78s.
Replacing shellac with vinyl records.
A phonograph record also known as a gramophone record especially in british english or simply a record is an analog sound storage medium in the form of a flat disc with an inscribed modulated spiral groove.
Shellac vs vinyl 78 s vs lp s shellac 78 s.
Many of these discs are now known as 78s because of their playback speed of 78 revolutions per minute give or take a.
The groove usually starts near the periphery and ends near the center of the disc.
Generally 78s are made of a brittle material which uses a shellac resin thus their other name is shellac records.
Unlike the standard 10 inch 78 rpm record which could play about 3 1 2 minutes on one side the new lp could hold 15 plus minutes on one side of a 10 inch record and up to 25 minutes on one side of a 12 inch disc.
The production of shellac records continued until the end of the 78 rpm format i e the late 1950s in most developed countries but well into the 1960s in some other places but increasingly less abrasive formulations were used during its declining years and very late examples in truly like new condition can have as low noise levels as vinyl.
Shellac records dominated the industry from 1912 to 1952 klinger says.
It had longer playing times was lighter and simply became the new thing differences in speed.
At first the discs were commonly made from shellac with earlier records having a fine abrasive.