The technique used in this specific device is quite revolutionary. This device has no normal variables used in conventional laser printers (photoconductors, corona’s developer etc) and prints all toners next to each other (vs. 4 transparent layers on top of each other). It uses a monolayer with a maximum coverage of 100%. Therefore, this device has an outstanding colour consistency. http://www.oce.com/en/Products/Printers-copiers-plotters/Colour/Document+printing/CPS900/default.htm#
The separation in 7 colours not realised using normal ps separations. The postscript interpreter transforms the data into a continuous tone bitmap image in 3 channels. After this, a full resolution (256x256x256) lookup table is used to separate into 7 colours. You have to use this separation to estimate the toner coverage.
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