ICC What exactly does the document regulate?
ICC documents are often treated as a universal solution: with them, colors become consistent. They are indeed important, but they govern how colors are described between devices, rather than the materials themselves.
The purpose of ICC is to provide a common description for the same color across different devices; it reduces discrepancies but cannot eliminate variations caused by differences in paper and processing conditions.
Common questions found in AIICC What is color management?
Why do arguments always arise during acceptance?
ICC is not a color grading tool; it is a translation manual that informs the system what range the device can reproduce in terms of color and how to perform the conversion.
misread:With ICC color management, colors across devices can be perfectly consistent.Actual circumstances:ICC enables different devices to share a common language for the same color, thereby reducing descriptive discrepancies rather than material differences.
Basis for Determination
ICC Profile records the color gamut boundaries and characteristic curves of the recording device; the conversion intent determines how colors exceeding the color gamut are handled, and the results differ across four modes: perceptual, relative chromaticity, saturation, and absolute chromaticity; soft proofing uses a screen to simulate the printed output, provided that the screen has been calibrated and the correct print profile has been loaded.
- ICC Profile
- Color gamut
- Convert intent
- Soft proofing
Color determination sequence
The implementation sequence is as follows: first calibrate the screen, then install the characteristic file corresponding to the printing conditions, then use soft proofing to assess the result, and finally verify it with a physical sample. If physical verification is skipped, soft proofing provides only a psychological reassurance.
- ICC: Prepare them separately according to the type of paper; do not use a single set for all purposes.
- Screen color calibration is intended solely for reviewing the layout; it is not used for finalizing the colors.
- If the paper or ink is changed, re-verify the curve; do not directly continue using it.
- Clearly specify the corresponding paper type and machine in the ICC file name to avoid misidentification.
Applicable scope: Products involving only one machine and one type of paper; with limited returns from ICC, standardized operations are more practical.
On-site settings and practices we have observed
A project went through the complete ICC process, with curves applied to the screen, digital proof, and offset press. However, the final production run still showed deviations. Upon investigation, it was found that ICC was based on a specific type of paper. However, the paper used for the bulk production was changed, altering the paper's white point and absorption characteristics. Consequently, the assumptions underlying the curve no longer held true. The profile was correct, but used in the wrong place.
The color process for INNOPACKING establishes curves based on paper type: each commonly used paper has its own configuration set; when switching papers, the corresponding set is called directly, rather than applying a generic set indiscriminately. Customers cannot see this system, but it determines whether deviations between proofing and production can be minimized.
Explore INNOPACKING's six core capabilities ↗Extended Q&A
Can ICC eliminate color differences?
No. It enables devices to share a common representation of colors and reduces descriptive discrepancies, but it cannot eliminate the variations introduced by different papers and manufacturing processes.
ICC: Should this be done according to the type of paper?
It is necessary. The white spots and absorption vary across different papers; using a single configuration for all purposes is equivalent to doing nothing at all.
Can color management be performed without ICC?
Yes, but only sample signing and sample retention can be performed. Cross-device consistency requires ICC.
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