CDs sometimes referred to as Compact discs, are an example of digital data storage. Usually, the data stored in a CD can be audio, computer information, or video. When you insert the CD into a DVD, and it starts playing, it means that the data stored on it is being read by a focused tiny light source, also known as a laser. This article will tell you more about how CDs are made.
The materials used
CDs are made of different raw materials with different functions but, put together, perform the same task. They consist of a clear layer that is made of polycarbonate plastic substrate. Then there is a metallic layer that is usually reflective, and then the whole CD is protected by a thin clear coating made of acrylic plastic. The protective layer material can vary depending on the likes of the manufacturer. Some use gold r even silver.
The first layer acts as the protection for the data stored on the CD from damage. It also functions as the lens which focuses the player’s light source onto the data side. After the final protective layer is put, a lacquer film is added to the reflective layer. After that, the label layer is added on top of the protective layer. The label layer always contains the graphics, title, and any other relevant information about the CD.
How CDs are made
The CD manufacturing process is rigorous as universality must be maintained. Some standard measurements and designs have been developed by Sony and Philips, which helps the manufacturers in the process. First off, the diameter of a CD has to be 7.72 millimeters. Secondly, the thickness has to be 1.2 millimeters, and then the hole in the center is 0.59 of an inch which is the same as 1.5 millimeters in diameter.
During the CD manufacturing process, a lot of attention is put on the weight, and the standard weight is .53 of an ounce, equivalent to 15grams. Another critical factor is storage; CDs have different storage capacities, some can carry up to 74 minutes of data, and some can only carry up to 50 minutes of data. The storage capability of the CD is dependent on the type of layers it has.
CD manufacturing and production is a keen process that requires utmost attention. CDs use digital tech, which helps them avoid any problems in audio recording or photographs Optical Media Manufacturing Inc. & Indy Vinyl Pressing!.