Graphics Multimedia

Digital Color Management: Principles and Strategies for the by Jan-Peter Homann

By Jan-Peter Homann

The booklet describes colour administration for the print creation with a spotlight on enforcing criteria for separation, delicate evidence, agreement facts, information supply and printing.

The fundamentals and methods are precise at developing vendor-independent colour administration workflows which may simply be discovered with top functions from e.g. Adobe, AGFA, GMG, Heidelberg, Kodak and X-Rite.

The writer explains with a different graphical suggestion how various criteria comparable to ISO 12647, SWOP, GRACoL, G7, ICC profile structure and PDF/X healthy jointly.

He describes the details for developing colour administration and qc from the print shopper over images, organisation and pre-press to the printer. The publication has a robust specialize in communique among print purchaser, photographer, enterprise, pre-press and printers. in line with the simplest perform in verbal exchange it explains the real steps for qc for electronic information, agreement proofs and prints.

"This first-class e-book, now to be had in English for the 1st time, bargains an perception and sensible suggestion on all components of ICC colour administration. in addition to providing information at the software of image arts workflows, it presents a historical past to paint conception that even the main skilled during this zone will locate useful." Paul Sherfield, The lacking Horse Consultancy

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Extra resources for Digital Color Management: Principles and Strategies for the Standardized Print Production

Sample text

Generally, the further the a paper’s b* value goes into the negative, the more optical brightener it contains. It can be generally said that color management mostly works fine for papers with values between b* –3 and b* 3 and that problems increase the bluer the paper becomes. A look at the illustration below shows that practically all papers used by photographers, graphic studios and agencies on an inkjet or color laser printer give problems in color management. Relative radiant energy 150 Relative radiant energy 150 100 100 50 50 0 0 400 450 500 550 600 650 700 Wavelength in nm b* –12 400 b* –4 uncoated paper offset print 450 500 550 b* 0 600 650 700 Wavelength in nm b* 3 art paper offset print standard papers for laser printer/copier papers rotary offset high-quality paper for laser printer/copier standard papers for inkjet printer proof media photo papers for inkjet printer fine art papers for inkjet printer 57 The Principles of Color Management Color management serves the purpose of ensuring color accuracy throughout the whole workflow from initial draft through to the finished printed product.

The color divisions are the same as those for saturation on the preceding pages. The rings, displayed in each level of lightness, show colors of the same saturation in steps of C = 15. It will become clear that the yellow tones can be reproduced in four-color offset printing with greater saturation than the blue area. While yellow in the lightness level L 85 reaches a saturation of C 90, blue in the lightness level L 45 shows a maximum saturation of C 45. View from above View from below 50 L 100 L 100 L 95 L 95 L 55 L 85 L 85 L 45 L 75 L 65 L 75 L 35 L 55 L 45 L 65 L 25 L 35 L 25 L 15 L 15 51 Measuring Lab Colors: the Spectrophotometer Spectrophotometers are the most important color-measuring devices in color management.

Each phosphor’s brightness is controlled by a cathode ray accordingly. The colors then merge in the eye. Modern TFT monitors, technically speaking, work differently, but try to emulate the colors of CRT monitors the best they can. As we know from the previous chapter, monitors are able to display colors that are brighter and more saturated than print allows. Because no monitor is the same as another, image data is reproduced differently on each one. Such differences can be corrected with a monitor profile.

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