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Monthly Archives: January 2020

Laquer was too hard to use in actual manufacturing, so a metal casting pattern was made. Initially, the laquer was covered with a layer of good conductive graphite, then silver or nickel plated. Once the plate is thick enough, the wax will be removed, leaving behind a stronger metal mold.

Modern techniques require immersing the disc in a solution of stannous chloride and then spraying it on a layer of silver atoms. Plating plates with conventional techniques are still widely used but do not achieve accurate reverberation.

After the initial silver plating has hardened, a fine copper layer is applied, followed by a stronger, coarser layer of metal, such as steel. Fine metal layer, composed of relatively small metal atoms, 85 particles/inch2 with magnification of 100 times the diameter, and features improved strength and toughness than rough steel particles, easily machined more work on the machine.

When the amount of metal was sufficient to support the silver plates, the laquer was smashed into the mold, leaving a metal cathode, or “mortar”.

The mold is still quite hard so it needs to be cast again before starting to compress the vinyl. The metal dish is referred to as the “mother”, cut from a mortar and then plated again to create another sound called a “stamper.”

Each stamper is attached to a 100 ton hydraulic compressor, basically like a mold and can produce thousands of disks before needing replacement.

Each hot vinyl foil is only about half the area but 3 times thicker than a finished disc, called a biscuit, slides between the two compressor jaws, and 300oF steam is used to soften the material before finishing, and compress Hot vinyl on the final shape while recording. Then the disc is cooled with water, becomes hard, and is labeled, all of which are done automatically.

Next, the discs are angled in a neat circle with an automatic trimmer, after which the discs are carefully checked, both visually and acoustically.

Finally, quality LPs are packed and shipped to independent local music retail stores.

Above is the full progress of making vinyl discs, which are used for vinyl record. As can be seen, it is complicated to create vinyl discs that have such steady production levels and amazingly natural sound quality. Hope you know understand how vinyl discs are made.

The first idea about vinyl discs came about 140 years ago thanks to Edison’s phonograph design, and the first records were also made for the first time in 1948 thanks to Columbia with the first 12-inch coal disc in the world.

It was first introduced to the public on June 20, 1948 at Waldorf-Astoria Hotel, New York. And since then many new technologies and mechanisms for listening to music have been born, but removing the vinyl disc from the condom, gently putting it on the turntable and lowering the lever is still possible. Intense shot with most music lovers.

“This is the time for serious music appreciation to create great music performances by the means of record discs. It can be said that the record discs succeeded in accurately and fully reproducing all the details of the symphony or opera performance.

Electrical recording and reproduction have combined to maintain the vitality and color of solo performances. ”- Per Compton Pakenham of The New York Times in 1930.

And the quality only improved in the 1950s with the launch of 33 RPMs, at about 25 minutes each, and the sound strip could be easily edited and optimized for audio in production, then inserted into a master-disc. This master-disc is known as a laquer or acetate disc. In fact, acetate is a misnomer when laquer disks are covered with cellulose nitrate.

And unlike most vinyl discs that are molded, master-discs are cut “manually”, grooves on the surface of the disc are created using a disc cutter needle with mechanical movements controlled by an audio input.

The grooves are checked regularly during the cutting process to ensure the proper depth of the cut path as well as adjust the volume and pitch. After the audio has been copied and the playback quality checked, the laquer will be sent to the production company.