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Vinyl it is a term that is used in the chemistry to name the monovalent unsaturated functional group Yet the substance which contains this functional group (usually a polymer of consistency similar to leather).

The concept is also used to refer to the vinyl record , also known as a gramophone record or simply vinyl. It is a sound reproduction format that is based on analog mechanical recording. Importantly, the discs could also be manufactured with plastic or aluminum

The vinyls were deprecated as of developing of cassettes and compact discs. However, the disc jockeys (DJs or DJs) use them for their musical creations; For this reason, its sales grew again after the rise of electronic music.

According to the number of songs containing per face and the diameter of the disc, one can speak of simple (one song per face),flexi disc (with a flexible plastic format), extended play (up to three songs per face), maxi simple (two or three songs per face) and long play (more than four songs per face).

He polyvinylchloride or Pvc On the other hand, it is a thermoplastic polymer that softens at 80ºC and decomposes at more than 140º C. This product has a great electrical and fire resistance. There are polyvinyl chloride rigid (used for pipes and containers) and flexible (used in footwear, pavement and other sectors).

Recording a vinyl record

He process The recording of a vinyl record is very complex, since it requires the fulfillment of seven well-defined stages. However, the total duration does not exceed 30 minutes. Let's look at each of the steps:

1) After having recorded, mixed and mastered the music on the corresponding medium, which is currently digital, it goes through a process that prepares it for the medium in which it will be distributed (this is called remastering). This stage is very important in the case of vinyl records, since it has a direct impact on their final quality; it is the moment in which noise can be eliminated, adjust the distribution of sound in the available channels, and correct the intensity;

2) This stage is known as the pattern disc cut and consists of transferring the content from the master tape to a master disk, which is also called master lacquer or lacquer master; It is a disc that is usually made of polished aluminum and is coated with black, bluish or reddish nitrocellulose lacquer, according to the desire of the manufacturer, and its thickness has a minimum of 0.6mm and a maximum of 1mm. For this task a machine called vertical lathe of phonographic recording is used; It has a head that is responsible for cutting and modulating the groove, to transfer the music to the disc. The recording signal goes through an equalization process that adjusts it to the physical characteristics of the disc;

3) Having completed the recording of disk pattern, it should be washed with soap and water, and then coated with tin chloride. Finally, a thin layer of silver adheres to it;

4) The disk is immersed in a nickel-based solution, which receives electricity to stimulate the coating. Then, it is removed and washed again;

5) The nickel and silver layer is removed, which contains a negative copy of the disk, called the parent or matrix disk;

6) From the parent disk you get the mother disk, a copy positive. Once the information is verified to be correct, the process is carried out seven more times and of each of the eight resulting discs two negative copies are produced, which are called stamping discs;

7) Finally, the stamping disc is used to obtain the commercial copy, which will be put on sale.

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