This is achieved by using adjustment curves applied in the same way as standard TVI curves. In the example below the file was printed on a digital device and the color bar in the center of the page was measured with press. Die Empfehlungen basieren auf dem k.SIGN and an i. 1. The target was ISOCoatedv. Hi Bastian, es ist richtig, dass das Farbergebnis bei der Konvertierung von RGB zu CMYK generell beeintr. Wycentrowanie dokumentu na stronie; Dodane znaczniki ci. Proof cyfrowy cennik A5, A4, A3, A2, B4, B3, B2. Co to jest proof (cd.): Proof jest to pr 4CX Technology Bodoni Systems 4CX Technology is included in pressSIGN 8 The 4CX technology is revolutionary way of achieving a natural grey balance for both. CMYK ICC profile. The 4. CX grey balance was then exported to. Auto. Curves. The file was then reprinted by dropping the PDF into the Auto. Curves hot folder. It is quick and easy. All of the default standards in press. SIGN already have a profile included. The source CMYK ICC profile describes the desired grey balance. The 4. CX curves that are created adjust the grey balance so that your print has the same visual appearance as the original. As only curves are used to make the adjustments there is no need for any complicated device link setups, solids and overprints are automatically preserved. Changes due to ink, paper or printer performance can a accommodated by just updating a set of 4. CX curves. Adjusting for print contrast. CX technology accounts for difference in print contrast for both CMY and K. If the black of the device has a different L* value to that of the target then 4. CX black adjustment curve takes this into account and scales the target L* value accordingly. If the print device produces a CMY solid different to that of the desired target then the grey balance is adjusted in response. Using 4. CX technology in litho & traditional print Achieving a matching grey balance in solids and overprints with 4. CX technology. In most cases we want to use the same grey balance of the target profile as that set for the solids and overprints. The solid ink and overprint colors are set in the target ICC profile and 4. CX uses the same grey balance. The default ISO 1. GRACo. L standards built into press. SIGN use this method. This method gives the best match for a press running to ISO 1. GRACo. L. Example. Solid/Overprint ICC Profile : ISOCoatedv. FOGRA 3. 9)Grey Balance ICC Profile : ISOCoatedv. FOGRA 3. 9)Matching different solid and grey balance conditions with 4. CX Technology. There are frequently cases where a different grey balance condition is required to that of the solids. You may, for example, the files are set up to ISO 1. GRACol 2. 00. 6, but the job will be printed on uncoated stock. In this instance you would select the target ICC profile to reflect the achievable solids and overprints and select the grey balance target based on the way that the files have been delivered to the press. Example. Solid/Overprint ICC Profile : PSO Uncoated. FOGRA 4. 7)Grey Balance ICC Profile : ISO Coatedv. FOGRA 3. 9)In this example where the files are created using ISO Coated v. The reason is that the grey balance and dot gain are very different between the files and the print target. CX adjusts the print contrast and grey balance to align the color balance of the files to the press without the need to pre- process the files to an uncoated standard before printing. CX Technology and digital printing devices. There are two ways of applying 4. CX technology with digital devices such as laser printers, presses and large format inkjet. CX adjustment curves should only be applied to raw DEVICE DATA whatever existing color management workflow is used to convert files and calibrate the device. Raw device data is a measurement when it does not have any profiling or color management applied. CX technology applied to a profiled printer. CX is a fast and powerful solution for returning any digital device to the same condition as when the original profile was made. Output the press. SIGN 4. CX color bar turning all color management off. Measure the control strip and export the adjustment curves to the RIP or Color Server. Example: Color Server/RIP setup. Source ICC Profile : ISO Coated v. FOGRA 3. 9)Destination ICC Profile : i. Gen. 4. iccpress. SIGN setup. Solid / Overprint ICC : i. Gen. 4. icc. Grey Balance Profile : i. Gen. 4. icc. The 4. CX curve adjustments should be applied in the RIP or Color Server after the conversion from the source to destination profile. In effect the 4. CX curves essentially replace the calibration/re- linearization process. This method will produce accurate results provided the destination profile is still appropriate for the device and substrate in use. Correcting grey balance with 4. CX without profile conversion. Make sure all color management is turned off in the RIP and print the 4. CX color bar. Export the 4. CX adjustments to the RIP (making sure the color management/color conversion is still turned off in the RIP) or a color server capable of applying curve adjustments, like ink. WIZE Auto. Curves. Examplepress. SIGN Setup. Solid / Overprint ICC Profile : i. Gen. 4. icc. Grey Balance Profile : ISO Coatedv. ICC (FOGRA 3. 9)The grey balance profile should be the same as the profile embedded in the files. This method allows you to check in press. SIGN how far the solids and overprint values have changed since destination profile was created. CX technology without a target profile for solids and overprints. CX curve adjustments from a measured sheet. If there is no defined target for the solid inks then use press. SIGN to generate a target. Turn all color management off in the RIP and print one or more sheets with the 4. CX color bar. Select this/these measurements in the 'Job Window' and hit 'Calculate' to average the readings. Go to preferences to add a new standard and from the drop down list and select 'Measured Sheet'. Now select the appropriate Grey Balance target based on the file setup. This will give you the best grey balance and the widest color gamut the device is capable of producing. CX technology - Exchanging colorants / Multi- Color printing. If you change colorants on the print device then normally you would need to make a whole new profile. CX creates a grey balance adjustment based on the actual colorants in use. This can be applied to jobs that originally contained 5 colors and can now be printed using only 4 colors, saving time and money. Example. Original Job : CMYK + Red. New Job : C Red YKHere the red is replacing the Magenta. The original files are still CMYK. Using 4. CX technology the grey balance would be corrected to account for the new colorant. A visual check can be made by exporting the 4. CX curves as Adobe Curves and applying them in Photo. Shop. Use the same method for generating and applying the 4. CX adjustments as from a measured sheet.
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