Test Print Job 'ColorProof.ipds_pdf' — Page 9
PDF Tone Transfer Curves
In the upper area, full tone bars with the primary colors (CMYK) are printed across the
width of the page. Full tone coloration can be tested across the entire print area.
In the lower area, tone transfer curves with primary and secondary colors are printed.
The calibration is checked here both optically and by measurement.
The first pixels should be visible from 3% onwards. The optical density of the fields
should then increase constantly. At 97%, a few white spots in the raster can still be recog-
nized using a magnifying glass.
Chapter 6 - Operating the Printing System222
Test Print Job 'ColorProof.ipds_pdf' — Page 9
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