The martindale test method places a rotating disk with standard wool fabric on top of the marine vinyl and counts how many times the fabric goes around in circles.
Thickness vinyl disc.
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The lp from long playing or long play is an analog sound storage medium a phonograph record format characterized by a speed of 33 1 3 rpm a 12 or 10 inch 30 or 25 cm diameter and use of the microgroove groove specification introduced by columbia in 1948 it was soon adopted as a new standard by the entire record industry.
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However the quality obviously wasn t very good and the shallow grooves and thin material didn t exactly produce the best sound.
The flexi disc is made out of a flexible thin vinyl sheet.
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Apart from a few relatively minor refinements and the.
The desirable tip radius of the reproducing stylus for stereophonic disc records is 0 5 mils.
Most marine vinyl ranges in thickness from 0 06mm to 1 5mm thick.
At first the discs were commonly made from shellac with earlier records having a fine abrasive.
The groove usually starts near the periphery and ends near the center of the disc.
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Back in the 1980s many popular magazines would use these discs which contained popular hits or exclusive tracks.
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.
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You might ask yourself is thicker better.