Analysis of CIP3
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I. The concept of CIP3
The basic concept of CIP3 is manufacturing—a digital archive containing data for each stage of production. It is like a job ticket, and the data will follow the print job throughout the workflow. CIP3 describes several processes in a standard way so that the same information can be exchanged at different stages during production. If you want to automate the entire post-press production process, you need to digitize every procedure from quoting to shipping. All work instructions are digitally embedded into the work profile so that the operator can automatically track each step. This is the function of the CIP3 standard. In a CIP3 workflow, data about all departments needs to be entered only once, and then each department can use this information to shorten the work cycle, reduce waste and improve quality, and provide customers with better services.
Since the file is made in digital format, information about this file can be transferred to the printing shop and the binding shop in the prepress stage. This will allow you to fully prepare for your work before it arrives. For example, CIP3 data allows automatic presetting of ink keys on the press. The more accurate the adjustments are made before printing, the shorter the preparation time required to achieve the desired quality at full speed.
Second, CIP3 is a common language
The CIP3 uses the print production format (PPF) following the Postscript track to provide work instructions. PPF is a data structure standard that describes process control data. It uses Postscript as its primary language because of its openness, extensibility, and popularity. And if you use Postscript, any vendor can make its system compatible.
TIFF is selected as the format of the image data. With the advent of PDF and Portable Work Ticket File (PJTF), this format will also be included in the CIP3 specifications.
The information stored in the PPF includes some management information, such as job name, customer/creator, application software, date/time, and deadline, etc.; and production data, such as color separation preview image (for ink preset, transfer function) , color and density measurements, reticle, etc.); binding and processing data such as paper cutting and page removal programs; and finally, vendor-specific vendor data on machine construction.
To describe a working step so that it can be executed automatically, you need to explain several actions. For example, the prepress step needs to know the instructions for overprinting, color separation, and imposition. The press needs to know if the job is full-stencil, full-page or full-page reverse printing, and what the ink settings are. Postpress processing operations require folding, binding, cutting, gluing, packaging, and numbering.
The semantics of the CIP3 specification is to provide a clear and detailed description of each of the above steps. For example, defining a left edge for a square piece of paper is the most important for a cutting machine.
Every step in the production process must define meaningful information in the semantic description. For example, although the crop mark uses the Y value to determine the start of the page, and the H value determines the page height, the cutter does need to know the Y+H distance to find the location of the first crop setting. The definition of this reference point is very important.
Third, the operation of CIP3
Data stored in the PPF file is translated when rasterized. This ensures greater accuracy and faster plate speeds than manual plate or plate scans.
PPF files can be stored on the hard disk, smart card or via the network into the print control interface. For example, the ink value can be downloaded to the print console to automatically preset the ink fountain key, and the processing data can also be transmitted to the bookbinding machine.
In addition, the PPF thumbnail image can be printed out as a record by a Postscript printer to check the integrity of the job or to provide a hard copy of the uncomputerized printer ink settings.
On the one hand, because many functions are involved in the workflow, each function can write to or read data from the PPF file to access the CIP3 data. Therefore, it is almost impossible for a PPF file to be generated by a single application software.
E.g:
1. The imposition software may provide information for page placement, trim marks, and color patches; it may even give a fold and crop position.
2. The raster processor will make a low-resolution page.
3. The workflow system can insert data for job management.
On the other hand, a PPF file will be read by multiple wave applications.
E.g:
1. The cutting device reads the data related to the page setup and cut paper.
2. The printer will read the low resolution page description to find the ink coverage data.
3. All of these applications will read general job information such as the job name.
Therefore, it is highly probable that the PPF file will be used alone, at least because it is part of a Postscript branch. When a page is rasterized and the film or media is output, the Postscript file is no longer used. Therefore, the rasterization process will put CIP3 information in a file.
Fourth, the application of CIP3
Computer-to-plate technology (CTP) is the key to linking CIP3 from prepress to printing. Without CTP, the CIP3 instruction flow is interrupted on the laser image output machine. Now, due to the appearance of CTP, the PPF instruction set can be sent directly to the printing press.
MAN Roland is one of the first printer manufacturers to provide CIP3 linkage. Its PECOM control system can link CIP3-compatible Roland 300, 700 and 900 sheetfed printers, ROTOMAN web presses and other equipment.
The PECOM Technical Print Preparation (TPP) station can connect an Apogee PrintDrive workstation, a Galileo digital platesetter and multiple manroland presses into a network for efficient printing operations.
The Apogee PrintDrive can generate CIP3 files, and the Apogee print driver stores PPF files and image data that needs to be output to a direct plateetter or laser output machine. It contains all the information needed to set the ink fountain key. This eliminates the need for a plate scanner and eliminates the cost of plate scanning operations. The PrintDrive selection function has successfully passed tests on Heidelberg and Komori presses. With the maturity of PPF, including PJTF, Apogee's work ticket function will play a greater role in production automation. Apogee PDF Pilot can create job tickets by setting all prepress tasks, special colors, layouts, and bindings; there are also fields for accounting and other departments that enable printers to truly integrate print production.
The only way to make printing devices communicate effectively is through a device-independent, standardized format—CIP3. The responsibility for providing CIP3 technology falls on the manufacturer. With the further digitization of each printing program, the full automation of the entire printing system is just around the corner.