Digital proofing was developed with the development of the CTP direct plate making technology and is an indispensable part of the digital workflow. Of course, digital proofing is not limited to the specific part of “print proofsâ€. It is a specific application of the core technology of color management. It is based on color management and cannot be separated from the color management technology. This article combines EFI digital proofing software, describes the color management process of the printer, and can match the proofs with the printed drafts.
First, what is digital proofing?
In general, publishers or other customers only after obtaining the proofs provided by the printing factory and signing the confirmation, the printing factory will formally start printing the printed materials required by the customer. In this process, the process of making a printed sample by a printing house or proofing company based on the film or electronic file provided by the plate making company is called proofing. The customer checks the layout design and printing quality of the printed sample and signs that the sample can be used as a basis for printing. This process is called proofing.
Digital proofing is based on the color rendering range of the print color and the same RIP data as the printed content. The digital proofing device is used to reproduce the printed color, and the proofing proof can be produced according to the user's actual printing condition.
Theoretically speaking, the digital proofing device's color gamut is larger than the printing gamut, and it can be controlled by software to perform color space conversion between output devices, so that the digital proofing effect simulates the color effect of the printing output device, that is, the digital printer's color management process. Digital proofs replace the traditional proofs.
At present, the digital proofing system consists of two parts: digital proofing output device and digital proofing control software. The digital proofing output device refers to any color printer capable of digital output, such as a color inkjet printer, a laser printer, and the like. However, large format color ink-jet printers are currently available for print speed, format, screening, and product quality that meet the publishing and printing requirements; digital proofing software is like EFI digital proofing software system, screen digital proofing system, Fangzheng digital proofing system, etc. Wait.
Second, color management
Color management is the use of scientific and digital methods to correct various devices and record the device's color characteristics in the “profile†to obtain predictable colors on the device and reproduce the colors in different output environments. under. This is accomplished by establishing an objective set of rules for color communication between devices, so as to ensure the consistency of color transfer throughout the entire printing system.
It is precisely because the color management system provides the possibility of maintaining the same color in different equipments and using different raw materials. Digital proofing can replace the traditional mechanical proofing and become a new proofing method. Therefore, digital proofing is a specific application of the core technology of color management. It is based on color management and cannot be separated from color management technology.
The work involved in color management consists of three parts: device calibration, device characterization, and color conversion.
1 device calibration. It refers to the standardization of the device's color characteristics, which can produce predictable colors from a specific color input value. In order to compensate for the aging of the equipment or other factors, the equipment must be regularly calibrated.
2 Equipment characterization. Each type of device should have its own color characteristics. The device's color characteristics can be recorded through a combination of software and hardware to generate a "profile file." Device characterization is to create an "ICC Profile" that describes the color characteristics of the device.
3 color conversion. When the same image is output on different output devices, it will have different effects. The reason is that the color gamut size of different devices is different. When we want to set the color of the A device and go to the B device to output, we must use the "profile" of the A device to perform color conversion and matching through the color management software to find out the best color performance.
First, what is digital proofing?
In general, publishers or other customers only after obtaining the proofs provided by the printing factory and signing the confirmation, the printing factory will formally start printing the printed materials required by the customer. In this process, the process of making a printed sample by a printing house or proofing company based on the film or electronic file provided by the plate making company is called proofing. The customer checks the layout design and printing quality of the printed sample and signs that the sample can be used as a basis for printing. This process is called proofing.
Digital proofing is based on the color rendering range of the print color and the same RIP data as the printed content. The digital proofing device is used to reproduce the printed color, and the proofing proof can be produced according to the user's actual printing condition.
Theoretically speaking, the digital proofing device's color gamut is larger than the printing gamut, and it can be controlled by software to perform color space conversion between output devices, so that the digital proofing effect simulates the color effect of the printing output device, that is, the digital printer's color management process. Digital proofs replace the traditional proofs.
At present, the digital proofing system consists of two parts: digital proofing output device and digital proofing control software. The digital proofing output device refers to any color printer capable of digital output, such as a color inkjet printer, a laser printer, and the like. However, large format color ink-jet printers are currently available for print speed, format, screening, and product quality that meet the publishing and printing requirements; digital proofing software is like EFI digital proofing software system, screen digital proofing system, Fangzheng digital proofing system, etc. Wait.
Second, color management
Color management is the use of scientific and digital methods to correct various devices and record the device's color characteristics in the “profile†to obtain predictable colors on the device and reproduce the colors in different output environments. under. This is accomplished by establishing an objective set of rules for color communication between devices, so as to ensure the consistency of color transfer throughout the entire printing system.
It is precisely because the color management system provides the possibility of maintaining the same color in different equipments and using different raw materials. Digital proofing can replace the traditional mechanical proofing and become a new proofing method. Therefore, digital proofing is a specific application of the core technology of color management. It is based on color management and cannot be separated from color management technology.
The work involved in color management consists of three parts: device calibration, device characterization, and color conversion.
1 device calibration. It refers to the standardization of the device's color characteristics, which can produce predictable colors from a specific color input value. In order to compensate for the aging of the equipment or other factors, the equipment must be regularly calibrated.
2 Equipment characterization. Each type of device should have its own color characteristics. The device's color characteristics can be recorded through a combination of software and hardware to generate a "profile file." Device characterization is to create an "ICC Profile" that describes the color characteristics of the device.
3 color conversion. When the same image is output on different output devices, it will have different effects. The reason is that the color gamut size of different devices is different. When we want to set the color of the A device and go to the B device to output, we must use the "profile" of the A device to perform color conversion and matching through the color management software to find out the best color performance.
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