Many people are yet to get knowledgeable of CD-R discs even though they are acquainted with CDs. What they do not know is that a standard CD-R disc is also an 80 or 120mm disc made of polycarbonate and consists of a 74 minute or 650MB storage capacity. There are basically non-standard CD-R discs that hole an assortment of times together with amounts of information. Among these the most extensively used disc is the 80 minute form and the polycarbonate disc consists of a spiral groove printed in an organic dye that plays an effective role in guiding the laser at the time of reading and writing the disc.

Apart from this above the organic dye there is a thin layer of silver or gold, which is then topped with a protective layer of photo-polymerizable lacquer. In general 3 different dye formulas are used in CD-R discs. These include Cynanine dyes, Azo dye, Phthalocyanine dye.

Let’s begin with Cynanine dyes. In general these dyes are green in color and are mostly unstable also. It is this unsteadiness that makes this dye incongruous for archival purposes, as the dye will fade and become unreadable after a period of time. Azo dye exists as blue in color, and is stable, as a result it is normally rated with a lifetime in the area of decades.

Phthalocyanine dye, on the other hand, can be either silver or gold or even light green. Keep in mind that these are similar with Azo dyes, and are generally rated with a lifetime in the area of hundreds of years.

A painstaking research in internet can bring out more info on CD-R discs.