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Description
Highest Quality & Best Selling Thermal DVD-R!
High Performance Disc with Dependable Results
Capacity: 4.7 GB
Speed: 16x
Model No: 5060158312405
Surface: White thermal printable, for all thermal printers (Teac P55 & Everest Compatible)
Dye: Purple, azo based
Hub Printable: Yes, full surface with metalized hub
Packaging: shrink wrap
Carton Quantity:100
Box Quantity: 600
DVD-R is a "write once" technology that can be used in DVD-RW recorders and read by nearly any computer DVD drive or DVD player. DVD-R media uses only cyanine recording dyes which appear violet on the recording
side of the disc.
The laser of your DVD-RW drive heats the dye to a temperature of about 200 C, irreversibly melting a pitted pattern into the recording layer. A plastic layer alongside the dye expands into the newly available space creating a pit pattern similar to that of a conventional DVD. Your DVD player reads this highly reflective pattern for playback. Because the plastic layer melts into the dye layer to set the pattern, DVD-R discs cannot be re-recorded.
Unlike a stamped DVD, DVD-Rs are manufactured with a spiral groove (like a phono disc) called the pregroove. It provides a precise track for the writing laser to follow. A DVD player depends on following the recorded track of pits in order to track the spiral path.
A slight wobble in the pregroove in a pre-established pattern generates a frequency used as
a carrier signal; the timing information helps regulate servo motors,
tracking of the laser assembly, and focus of the beam. Land pre-pits
molded into the substrate provide address information and pre-recorded
data, used to initiate write operations.
The larger storage capacity of a DVD-R compared to a CD-R is achieved through a smaller pit size and smaller track pitch of the groove spiral which guides the laser beam. Consequently, more pits can be written on the same physical sized disc. In order to write smaller pits onto the recording dye layer a red laser beam with a wavelength of 650 nm (for general use recordable DVD, versus a wavelength of 780 nm for CD-R) is used in conjunction with a higher numerical aperture lens. Because of this shorter wavelength DVD-Rs use different dyes from CD-R to properly absorb this wavelength.
DVD-R recording requires a more complex write strategy to establish the appropriate lengths for the pits, which are approximately half the size of those on a CD-R disc. The spacing between the pits and lands within the spiral data pattern is also significantly less than on a CD-R disc.
What Makes River Media DVDRs the professionals best kept secret?
Error correction in DVD media is measured with PI and PO (parity inner and parity outer). Where as in CD error correction C1 errors that are not corrected become C2 errors, in DVD a uncorrected PI error becomes the more severe PO error. River Media DVDs are the culmination of many years of manufacturing and technical excellence. As a result the performance is second to none. Below are results from PI/PO scans of our DVD-R compared to a leading competitor.
River media printable surfaces
Recording performance has been heavily optimised and improved over
the years, as has the printable surfaces. River Media printable
disc surfaces feature:
- Extra fast dry inkjet surface - Dry to touch within
seconds
- No colour bleeding - Our inkjet formulae utilises special
pigment molecules which prevent colour bleeding
- Brilliant White - No off-white or cream finish, when we say
white we mean it!
- Thermal Surfaces Optimised for specific printers - River Media
offer dedicated discs for both full colour and mono printers
Satisfaction guaranteed
We're so confident in the quality of our media that should you not
be entirely satisfied we'll offer a full refund - no quibble.
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Blank Media & Packaging Specialists Tel: 0208 311 7077
Optical Media 
