By Jan-Peter Homann
The publication describes colour administration for the print creation with a spotlight on imposing criteria for separation, smooth evidence, agreement facts, facts supply and printing.
The fundamentals and techniques are exact at developing vendor-independent colour administration workflows that can simply be learned with major functions from e.g. Adobe, AGFA, GMG, Heidelberg, Kodak and X-Rite.
The writer explains with a special graphical thought how various criteria equivalent to ISO 12647, SWOP, GRACoL, G7, ICC profile layout and PDF/X healthy jointly.
He describes the details for developing colour administration and quality controls from the print purchaser over images, supplier and pre-press to the printer. The e-book has a robust concentrate on communique among print patron, photographer, organisation, pre-press and printers. in response to the simplest perform in conversation it explains the $64000 steps for qc for electronic facts, agreement proofs and prints.
"This very good booklet, now to be had in English for the 1st time, deals an perception and functional recommendation on all parts of ICC colour administration. in addition to providing info at the program of picture arts workflows, it presents a history to paint idea that even the main skilled during this sector will locate useful." Paul Sherfield, The lacking Horse Consultancy
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Extra info for Digital Color Management: Principles and Strategies for the Standardized Print Production
Below: Detail of a color-management profile’s table In reality the number of recorded color values varies between 27 and 32,000 depending on the profile’s accuracy. R G B L a b 0 191 191 75 – 44 – 14 b 100 0 191 0 191 54 81 – 46 191 191 0 80 – 17 75 60 40 –100 –80 –60 –40 –20 191 0 0 48 68 60 0 191 0 71 – 78 63 0 0 191 30 64 – 92 20 20 40 60 80 100 a –20 –40 –60 –80 –100 63 Characterizing and Profiling Printing Processes Different from scanners and monitors, the profiling of printing processes is much more complex.
The color examples are reproduced here somewhat darker and less saturated in order to maintain the visual difference between monitor colors and colors in print. 50 0 400 450 Relative radiant energy 150 100 50 The Importance of the Different Spectra Comparing the spectra of the ideal colors in the cube (left) with the monitor and print spectra (right) gives interesting results: The primary colors in print have spectra that are less saturated and often darker, compared to the ideal spectra. Either the receptors are not stimulated to the full (darker colors) or the receptors that don’t actually belong to these colors are also lightly stimulated (unsaturated colors).
This means it is not possible to profile the printer or printing machine as an individual device, but only a printing process with all its parameters. If a proof printer or printing machine is to be used with different papers, then different color profiles will be required. Where it is possible to control the range of inking, it might be necessary to profile the printing process with different ink applications. To create a profile a digital test sheet, with a representative selection of colors, is printed under tight known conditions (paper, color, ink application) and measured with a color-measuring device.