CD-R stands for CD-Recordable. Recordable CDs can be used once for recording data. Machines used to copy CD-Rs are called as CD-R copiers or CD-R duplicators.

CD-Rs consist of four layers-a label, a reflective layer, a dye-coated layer and a protective polycarbonate layer. Information is contained on CD-Rs by pits and hills on the dye layer. When a CD-R is introduced in the copier, the information is read from the master CD's pits and hills. Then the laser recorder head burns those same regions in the dye layers of the blank CDs. These layers become the pits. The other layers are called hills. In this manner, the data is transferred onto the blank CDs in the form of pits and hills.

Three basic methods are employed to copy data onto blank CD-Rs. The first method is called 'disk at once'. In this method, all the information is copied onto the blank CD-R at once. The other method is 'track at once', in which one track is copied at one time. More tracks can be copied at a later stage. The third method is 'packet copying', which allows a packet of data to be copied at a time. This packet can be later made invisible and new data can be copied onto it.

The most efficient method of copying information onto a blank CD-R is the disk at once method. It not only saves time and effort, but it also saves space on the CD-R, as the data is all clustered together. There are also no format problems when all data is stored at once.

CD-Rs are also available in manual and automated versions. Automated modes can copy as many as 150 CD-Rs per hour, depending on their capacities. Standalone CD-R copiers can contain two to 16 CD-R copier drives and are very efficient for multi-session copying. Most standalone CD copiers can copy at a speed of 52 times. CD-R copiers can be attached to PCs in order to customize CDs and make the burning process faster.

CD Copiers provides detailed information about CD copiers, CD DVD copiers, CD copier software, CD copier downloads and more. CD Copiers is the sister site of DVR Cards.