<P> Unfortunately, many manufacturers have added additional coloring to disguise their unstable cyanine CD - Rs in the past, so the formulation of a disc cannot be determined based purely on its color . Similarly, a gold reflective layer does not guarantee use of phthalocyanine dye . The quality of the disc is also not only dependent on the dye used, it is also influenced by sealing, the top layer, the reflective layer, and the polycarbonate . Simply choosing a disc based on its dye type may be problematic . Furthermore, correct power calibration of the laser in the writer, as well as correct timing of the laser pulses, stable disc speed, and so on, is critical to not only the immediate readability but the longevity of the recorded disc, so for archiving it is important to have not only a high quality disc but a high quality writer . In fact, a high quality writer may produce adequate results with medium quality media, but high quality media cannot compensate for a mediocre writer, and discs written by such a writer cannot achieve their maximum potential archival lifetime . </P> <Table> <Tr> <Th> Data writing speed </Th> <Th> Data writing rate </Th> <Th> Write time for 80 minute / 700 MiB CD - R </Th> </Tr> <Tr> <Td> 1 × </Td> <Td> 150 kB / s </Td> <Td> 80 minutes </Td> </Tr> <Tr> <Td> 2 × </Td> <Td> 300 kB / s </Td> <Td> 40 minutes </Td> </Tr> <Tr> <Td> 4 × </Td> <Td> 600 kB / s </Td> <Td> 20 minutes </Td> </Tr> <Tr> <Td> 8 × </Td> <Td> 1.2 MB / s </Td> <Td> 10 minutes </Td> </Tr> <Tr> <Td> 12 × </Td> <Td> 1.8 MB / s </Td> <Td> 7.5 minutes </Td> </Tr> <Tr> <Td> 16 × </Td> <Td> 2.4 MB / s </Td> <Td> 5 minutes </Td> </Tr> <Tr> <Td> 20 × </Td> <Td> 3.0 MB / s </Td> <Td> 4 minutes </Td> </Tr> <Tr> <Td> 24 × </Td> <Td> 3.6 MB / s </Td> <Td> 3.4 minutes (see below) </Td> </Tr> <Tr> <Td> 32 × </Td> <Td> 4.8 MB / s </Td> <Td> 2.5 minutes (see below) </Td> </Tr> <Tr> <Td> 40 × </Td> <Td> 6.0 MB / s </Td> <Td> 2 minutes (see below) </Td> </Tr> <Tr> <Td> 48 × </Td> <Td> 7.2 MB / s </Td> <Td> 1.7 minutes (see below) </Td> </Tr> <Tr> <Td> 52 × </Td> <Td> 7.8 MB / s </Td> <Td> 1.5 minutes (see below) </Td> </Tr> </Table> <Tr> <Th> Data writing speed </Th> <Th> Data writing rate </Th> <Th> Write time for 80 minute / 700 MiB CD - R </Th> </Tr> <Tr> <Td> 1 × </Td> <Td> 150 kB / s </Td> <Td> 80 minutes </Td> </Tr>

When did the first cd burner come out