The 5B.3 replaces the 5259 signal testdisc. Each Test sample of 5B.3 is calibrated against the 5259 signal test disc separately. Multi-point Calibration CD set The discs are intended to be used for calibration of CD test equipment. A leaflet on these CD test discs. Each disc is individually measured.
Different manufacturers use different dye technologies and phase change material.
The pregroove design is optimised for each process and can therefore differ considerably. Customised calibration discs measured on the reference system will improve the measurement tolerances. Accuracy Discs are tested according IEC908 documented and uniquely identified. The used instruments for testing are calibrated against laboratory standards that are either traceable to the National Institutes of Standards or are derived by approved ratio techniques. For ISO certification purposes you can regard the Philips measurement data belonging to the disc as a direct link with a certified reference.