CIP3 means computer integrated prepress, printing, postpress, prepress equipment (such as computers, scanners, digital cameras, imagesetters, platesetters, digital proofing machines, etc.) with printers and cutters and foldings The machine is connected through network, floppy disk, Smart card or manual data input, replaces the original experience with data, and manages the printing process with data, so that the machine can achieve data and standardized management under normal linearization standards. High quality, high yield, low cost. CIP4 adds a lot of more complete information collection, tracking and analysis on the basis of CIP3, and even has to give special instructions on the instructions, such as ink printing Lab value requirements, quantity instructions for printing different editions, etc. Prepress, Press, Postpress and other 3P, plus the fourth P of Data Processing data processing, became the new organization of CIP4. The CIP4 organization basically provides specifications, and is not itself a software or hardware producer. CIP 4 The worksheet was changed to JDF file format, and the workpiece customer, name specification, requirements and special requirements, precautions, even the lab color value concentration requirements and postpress processing parameters were also written in. If the ink dot area dot area ratio is completed, Can also be stored in the JDF (Job Definition Format) working document, JDF document to XML extensibility language, than the CIP3 PDF language, can hold more new job instructions and regulations, and the XML language can also be One of the languages ​​used across multiple platforms.
First, the traditional ink preset method
In the traditional way of ink presetting, the operator of the printing press usually presets the amount of ink deposited by the ink spoon according to experience. Before starting the machine, according to the distribution of printing plates or proofs, estimate the approximate amount of ink in each ink zone as the preset value of the ink volume, and then make further adjustments according to the specific changes in the printed matter after starting up. Obviously, this way of releasing ink is relatively rough, and the accuracy is different due to differences in human experience and subjective understanding. This kind of pre-inking method has a large amount of paper consumption from the time of starting up to the official printing, and the adjustment takes time, and the work intensity of the machine operator is correspondingly increased.
Second, based on CIP3/CIP4 standard pre-inking technology
At present, CIP3 or CIP4, which is mentioned by most manufacturers, is the transmission of pre-inking materials and the maintenance of the quality of printed matter. In terms of assisting ink release, the most important thing is to help the printing operator to eliminate the manual ink discharge inconsistency and waste of time. The required ink discharge data is directly obtained from the pre-press data file, and is transmitted to the printing after a simple conversion. The ink console of the machine does the pre-discharging adjustment, because such an auxiliary ink discharging method greatly saves time, thereby improving the efficiency.
The pre-discharging system of offset printing presses, in addition to the original integrated operating system, also employs methods from other manufacturers' systems. Its purpose is to be able to use a familiar visualization system independently of the different printing press systems. This not only allows the printer to pre-ink out, but also connects to the printer for scanning and automatic feedback. Wait.
1. Generation of pre-ink release data
To pre-release the ink before the printer is turned on, the most important thing is to pass the pre-press version of the file to the corresponding conversion software and pass it to the operating system of the printer. However, the number of ink zones per press is not the same for every device manufacturer. For the boot of Heidelberg [Product News Space], it is 32 ink zones per seat. The width of each ink zone is 32.5mm, while Roland 700 is 34 ink zones, and the width of each ink zone is 30mm. Before the appearance of CIP3, the operator of the printing press would pre-discharge the ink according to the dot area ratio of each ink zone corresponding to each color plate. Press the button by hand to adjust the opening and closing of the ink key. Take a 32-ink four-color printing press as an example, put a four-color ink at least to move to 128 ink keys, and each ink key must be added again. The ink or ink reduction action means that the press operator must constantly press the up and down keys to add or subtract ink.
In the past era of hand-printed edition, the printing plate made of film was taken to the scanning machine, and the dot area ratio of the whole page was scanned according to the ink area of ​​the printing machine to obtain the dot area percentage of each ink zone. Then the percentage of each ink zone is passed to the operating system of the press. The printer can adjust the amount of ink for each color and each color. The plate scanner is a large-scale scanner that measures the percentage of the dot-printed dot in each ink zone.
Now that you have a large version of the document data, you need to calculate the dot area rate of each ink area. For the printing plate, the dot on the plate is not only the size of the dots, but also each point is all black and is the smallest unit that accepts ink. These dots are smaller in the 1-bit Tiff file. The same point is composed.
In fact, a 1-bit Tiff file is what lets a laser imagesetter or a CTP plate maker know where to punch and which is not. And these points, regardless of their size, are black spots. After the information is transmitted to the plate, the main function is to accept the ink.
To sum up, the percentage of ink area outlets calculated from the scanner and the 1-bit Tiff file are based on the proportions of black (white dots) and white (blank portions). The division, according to the size of the ink zone (inkzone) to calculate the amount of ink in each ink zone. Therefore, if the pre-ink release percentage is obtained, it can be calculated from the PDF version of the pre-press process, or from the 1-bit Tiff file generated by the RIP post-imposition version. In order to achieve the purpose of data exchange, it must be written in a common format. The most common format is the PPF file format defined by CIP3, or the JDF file format of CIP4. Most of these standard formats can be obtained by RIP, and most of them can accept 1-bit Tiff or PDF large-format data files in terms of using interfaces.
2. Pre-inking data transmission
With the pre-inking data, the ink key of the printer cannot be directly controlled. The dot area rate of each ink area is recorded in the PPF file, but the same effect can not be achieved by different manufacturers' printing machines. The data on the PPF file obtained from the large version of the document, for the same type of printer, the data are relatively constant. After the pre-inking data is transmitted to the control machine of the printing machine, it must be adjusted by the ink discharge curve of the printing machine operation system to ensure that the pre-adjustment of the ink key can obtain the desired effect.
At present, the software used to connect the CPP3/4 PPF or JDF file to the press console at home and abroad is the InkZone series software developed by Digital Information Ltd. of Switzerland. The InkZone software is used as an example to illustrate the transmission of pre-inking data.
The DI-Plot software is designed to increase the productivity of the printing industry. Its unique conversion and calculation tools can read 1-bit TIFF, 8-bit TIFF, CIP3/4 format files and can be converted to the required output formats such as CIP4/JDF, PDF, TIFF, and more. Here, DI-Plot reads 1-bit Tiff file or PPF file to get pre-inking data and stores it in .ink format. For example, there is a print A made of the CTP version, to produce a copy of A0.ppf, and the A0.ppf file is sent to the DI-Plot software. The DI-Plot converts A0.ppf to InkZone's internal file format A0. InkZone PERFECTOR software is then converted into a machine-readable format. In the case of a Heidelberg press, InkZone PERFECTOR converts A0.ink to A0.hei, and if it is a Manroland [product] press, it is converted to A0.man. The Komori press is converted to A0.kom, and then the corresponding data is transmitted to the printer's ink console. If this data is adjusted by the operator during the printing process and meets acceptable quality requirements, this set of adjusted ink control data (A1.hei or A1.man or A1.kom) will be stored back to InkZone PERFECTOR. Hard disk for future linearization.
However, due to the non-linear relationship between the ink output from the printer ink and the nominal scale, the layout ink information is based on the layout information and is calculated by the linear data, and due to the long service life and equipment wear, the ink fountain ink The key is in a non-standard state, coupled with the printing materials used, the type of ink, the type of plate, the temperature and humidity of the environment, and so on. At this time, it becomes necessary to adjust and convert the pre-inking data. The ink fountain actual ink discharge data tends to be consistent.
3. The method of stable ink control
Although there is a pre-inking curve setting, due to the influence of various factors such as the structure of the ink path of the printer itself, the characteristics of the ink, the layout of the layout of the layout, the speed of the printing press, etc., it is not possible to reach the ideal concentration value. Until the end of printing. Therefore, it is necessary to use various methods to achieve stable and accurate ink control.
1 subjective visual method. This method is subjectively observed by the human eye, but not necessarily quickly. Because the human eye is the most sensitive but also the most easily fatigued, and at the same time taking care of the ink keys on the four color plates, with 32 ink keys per unit, there are 128 ink keys to adjust, although not every The ink keys need to be adjusted, but the workload is also quite large, and the judgment and experience of each printing chief is not the same, often causing quality instability.
2 instrument measurement. This method is usually the printing operator to print the printed matter on the viewing stage, using a densitometer or spectrophotometer to scan each color block on the color guide, which color plate, which ink key Need to add or subtract ink, then transfer this information to the stepper motor on the ink key to adjust the ink discharge amount. There are also equipment manufacturers that have developed monitoring devices that scan the entire color value of a print, rather than scanning a single color guide, such as the CPC system in Heidelberg.
Third, the summary
CIP3/4 ink preset technology is now increasingly used in production, which can reduce the use of paper and ink, greatly reduce production costs, and increase the competitiveness of companies. And the ink preset system using the prepress file has a high degree of accuracy. The improvement of precision means that the color effect of the sample draft can be achieved without having to perform multiple trial printings, naturally reducing the paper and ink used in many trial printings. The main performance is:
1 Shorten boot preparation time and increase the efficiency of the press. An imported four-color printing machine can complete single-sided four-color registration and color correction of printing plates in 10 minutes, shortening the traditional printing and coloring time, and adapting to the time requirements for short-lived printing.
2 with the ink volume data optimization function to improve the accuracy of ink preset and ink control accuracy. Since the introduction of data process flow replaces the manual color correction link, it can ensure that the printed sample is consistent with the printed product, and can be repeatedly repeated and consistent, and can adapt to the current customer's high quality requirements for color.
3 Reduce production costs. Since the number of trial printing is reduced and the time required for the start-up of the printing machine is shortened, it means that more time is available for normal production work. This reduces certain fixed expenses that the company should have paid, and greatly reduces the cost of production.
Therefore, the introduction of CIP3/4 technology has to be said to be a major breakthrough in improving the quality of print products, reducing costs, increasing profits, expanding new markets, and improving the competitiveness of enterprises.
First, the traditional ink preset method
In the traditional way of ink presetting, the operator of the printing press usually presets the amount of ink deposited by the ink spoon according to experience. Before starting the machine, according to the distribution of printing plates or proofs, estimate the approximate amount of ink in each ink zone as the preset value of the ink volume, and then make further adjustments according to the specific changes in the printed matter after starting up. Obviously, this way of releasing ink is relatively rough, and the accuracy is different due to differences in human experience and subjective understanding. This kind of pre-inking method has a large amount of paper consumption from the time of starting up to the official printing, and the adjustment takes time, and the work intensity of the machine operator is correspondingly increased.
Second, based on CIP3/CIP4 standard pre-inking technology
At present, CIP3 or CIP4, which is mentioned by most manufacturers, is the transmission of pre-inking materials and the maintenance of the quality of printed matter. In terms of assisting ink release, the most important thing is to help the printing operator to eliminate the manual ink discharge inconsistency and waste of time. The required ink discharge data is directly obtained from the pre-press data file, and is transmitted to the printing after a simple conversion. The ink console of the machine does the pre-discharging adjustment, because such an auxiliary ink discharging method greatly saves time, thereby improving the efficiency.
The pre-discharging system of offset printing presses, in addition to the original integrated operating system, also employs methods from other manufacturers' systems. Its purpose is to be able to use a familiar visualization system independently of the different printing press systems. This not only allows the printer to pre-ink out, but also connects to the printer for scanning and automatic feedback. Wait.
1. Generation of pre-ink release data
To pre-release the ink before the printer is turned on, the most important thing is to pass the pre-press version of the file to the corresponding conversion software and pass it to the operating system of the printer. However, the number of ink zones per press is not the same for every device manufacturer. For the boot of Heidelberg [Product News Space], it is 32 ink zones per seat. The width of each ink zone is 32.5mm, while Roland 700 is 34 ink zones, and the width of each ink zone is 30mm. Before the appearance of CIP3, the operator of the printing press would pre-discharge the ink according to the dot area ratio of each ink zone corresponding to each color plate. Press the button by hand to adjust the opening and closing of the ink key. Take a 32-ink four-color printing press as an example, put a four-color ink at least to move to 128 ink keys, and each ink key must be added again. The ink or ink reduction action means that the press operator must constantly press the up and down keys to add or subtract ink.
In the past era of hand-printed edition, the printing plate made of film was taken to the scanning machine, and the dot area ratio of the whole page was scanned according to the ink area of ​​the printing machine to obtain the dot area percentage of each ink zone. Then the percentage of each ink zone is passed to the operating system of the press. The printer can adjust the amount of ink for each color and each color. The plate scanner is a large-scale scanner that measures the percentage of the dot-printed dot in each ink zone.
Now that you have a large version of the document data, you need to calculate the dot area rate of each ink area. For the printing plate, the dot on the plate is not only the size of the dots, but also each point is all black and is the smallest unit that accepts ink. These dots are smaller in the 1-bit Tiff file. The same point is composed.
In fact, a 1-bit Tiff file is what lets a laser imagesetter or a CTP plate maker know where to punch and which is not. And these points, regardless of their size, are black spots. After the information is transmitted to the plate, the main function is to accept the ink.
To sum up, the percentage of ink area outlets calculated from the scanner and the 1-bit Tiff file are based on the proportions of black (white dots) and white (blank portions). The division, according to the size of the ink zone (inkzone) to calculate the amount of ink in each ink zone. Therefore, if the pre-ink release percentage is obtained, it can be calculated from the PDF version of the pre-press process, or from the 1-bit Tiff file generated by the RIP post-imposition version. In order to achieve the purpose of data exchange, it must be written in a common format. The most common format is the PPF file format defined by CIP3, or the JDF file format of CIP4. Most of these standard formats can be obtained by RIP, and most of them can accept 1-bit Tiff or PDF large-format data files in terms of using interfaces.
2. Pre-inking data transmission
With the pre-inking data, the ink key of the printer cannot be directly controlled. The dot area rate of each ink area is recorded in the PPF file, but the same effect can not be achieved by different manufacturers' printing machines. The data on the PPF file obtained from the large version of the document, for the same type of printer, the data are relatively constant. After the pre-inking data is transmitted to the control machine of the printing machine, it must be adjusted by the ink discharge curve of the printing machine operation system to ensure that the pre-adjustment of the ink key can obtain the desired effect.
At present, the software used to connect the CPP3/4 PPF or JDF file to the press console at home and abroad is the InkZone series software developed by Digital Information Ltd. of Switzerland. The InkZone software is used as an example to illustrate the transmission of pre-inking data.
The DI-Plot software is designed to increase the productivity of the printing industry. Its unique conversion and calculation tools can read 1-bit TIFF, 8-bit TIFF, CIP3/4 format files and can be converted to the required output formats such as CIP4/JDF, PDF, TIFF, and more. Here, DI-Plot reads 1-bit Tiff file or PPF file to get pre-inking data and stores it in .ink format. For example, there is a print A made of the CTP version, to produce a copy of A0.ppf, and the A0.ppf file is sent to the DI-Plot software. The DI-Plot converts A0.ppf to InkZone's internal file format A0. InkZone PERFECTOR software is then converted into a machine-readable format. In the case of a Heidelberg press, InkZone PERFECTOR converts A0.ink to A0.hei, and if it is a Manroland [product] press, it is converted to A0.man. The Komori press is converted to A0.kom, and then the corresponding data is transmitted to the printer's ink console. If this data is adjusted by the operator during the printing process and meets acceptable quality requirements, this set of adjusted ink control data (A1.hei or A1.man or A1.kom) will be stored back to InkZone PERFECTOR. Hard disk for future linearization.
However, due to the non-linear relationship between the ink output from the printer ink and the nominal scale, the layout ink information is based on the layout information and is calculated by the linear data, and due to the long service life and equipment wear, the ink fountain ink The key is in a non-standard state, coupled with the printing materials used, the type of ink, the type of plate, the temperature and humidity of the environment, and so on. At this time, it becomes necessary to adjust and convert the pre-inking data. The ink fountain actual ink discharge data tends to be consistent.
3. The method of stable ink control
Although there is a pre-inking curve setting, due to the influence of various factors such as the structure of the ink path of the printer itself, the characteristics of the ink, the layout of the layout of the layout, the speed of the printing press, etc., it is not possible to reach the ideal concentration value. Until the end of printing. Therefore, it is necessary to use various methods to achieve stable and accurate ink control.
1 subjective visual method. This method is subjectively observed by the human eye, but not necessarily quickly. Because the human eye is the most sensitive but also the most easily fatigued, and at the same time taking care of the ink keys on the four color plates, with 32 ink keys per unit, there are 128 ink keys to adjust, although not every The ink keys need to be adjusted, but the workload is also quite large, and the judgment and experience of each printing chief is not the same, often causing quality instability.
2 instrument measurement. This method is usually the printing operator to print the printed matter on the viewing stage, using a densitometer or spectrophotometer to scan each color block on the color guide, which color plate, which ink key Need to add or subtract ink, then transfer this information to the stepper motor on the ink key to adjust the ink discharge amount. There are also equipment manufacturers that have developed monitoring devices that scan the entire color value of a print, rather than scanning a single color guide, such as the CPC system in Heidelberg.
Third, the summary
CIP3/4 ink preset technology is now increasingly used in production, which can reduce the use of paper and ink, greatly reduce production costs, and increase the competitiveness of companies. And the ink preset system using the prepress file has a high degree of accuracy. The improvement of precision means that the color effect of the sample draft can be achieved without having to perform multiple trial printings, naturally reducing the paper and ink used in many trial printings. The main performance is:
1 Shorten boot preparation time and increase the efficiency of the press. An imported four-color printing machine can complete single-sided four-color registration and color correction of printing plates in 10 minutes, shortening the traditional printing and coloring time, and adapting to the time requirements for short-lived printing.
2 with the ink volume data optimization function to improve the accuracy of ink preset and ink control accuracy. Since the introduction of data process flow replaces the manual color correction link, it can ensure that the printed sample is consistent with the printed product, and can be repeatedly repeated and consistent, and can adapt to the current customer's high quality requirements for color.
3 Reduce production costs. Since the number of trial printing is reduced and the time required for the start-up of the printing machine is shortened, it means that more time is available for normal production work. This reduces certain fixed expenses that the company should have paid, and greatly reduces the cost of production.
Therefore, the introduction of CIP3/4 technology has to be said to be a major breakthrough in improving the quality of print products, reducing costs, increasing profits, expanding new markets, and improving the competitiveness of enterprises.
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