As humans enter the 21st century marked by digitization, the publishing and printing field is based on modern computer and network technology. It has begun to completely transform from the traditional simulation or modular mixing process to a new digital production process, and gradually to high quality and high efficiency. High dynamic, real-time and personalized production process direction. As a result, the publishing and printing industry is faced with how to solve the problems associated with traditional production processes based on chemical processing and operation experience, high material consumption, high cost, poor quality stability and repeatability, and long production cycle. Therefore, it is impossible to fully determine the current personalized market and many varieties. , high quality, low cost, short cycle problems. In particular, it has published standards for the inspection and acceptance of printed materials, and has passed inspection standards. The proof of color proofs is the most prominent. Therefore, how to use the shortest time and the best method to fully determine all kinds of different printing methods, printing conditions, and proofing of printing products have become the bottleneck and research hotspot of the publishing printing production process.
I. Digital Production Process and Digital Proofing At DRUFA 2000, Heidelberg represented the launch of nine publishing and printing production solutions based on computer and network technologies, marking that the traditional publishing and printing industry has begun to fully enter the era of digital production. The so-called digital production process refers to the integration of various processes and links in publishing and printing production through computers and their networks, and the construction of a digital integrated publishing system that includes prepress, printing, postpress and process control and management of all-digital production operations. The process worksheet replaces traditional worksheets to transfer, control and manage information in the production process. Digital proofing, direct platemaking, and digital printing replace traditional production operations, maximizing product quality, reducing process links, and reducing time redundancy. Ensure product quality is efficient, stable and consistent. Digital proofing refers to a new type of proofing technology that directly outputs color proofs based on the digital publishing system, and handles the graphic and textual information in accordance with the publishing and printing production standards and specifications during the print production process. The current general process of digital proofing is shown in the following figure: 
Among them: NO (1) locality error, using directly modified RIP after PS file;
NO(2) is erroneous in its entirety, and it is modified by using the returned graphic processing section.
As can be seen from the figure, digital proofing is a key process link in the digitalization of the publishing and printing process, which directly restricts the production process and product quality of publishing and printing.
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 color laser printer, a color sublimation printer, a color thermal printer, etc., but currently can fully meet the print speed requirements for publishing and printing. The format, screening method and product quality are mostly large-format color inkjet printers, such as HP5000, EPSON7000/9000/10000, ROLAND400/500/600, ENCAD Novajet and so on. Digital proofing software includes RIF, color management software, layout, control data management and input and output interfaces. It mainly completes the digital screening of images and texts, page splitting and splitting, and the matching of Ink City and Ink City. , data storage for different printing methods and processes, data exchange between various devices, etc. Digital proofing software is the core and key of the system and directly determines the process of digital proofing replacing traditional proofing.
Second, the comparison of digital proofing and traditional proofing Digital proofing integrates the latest theories and techniques in the field of publishing and printing, so compared with the traditional proofing has the following technical advantages:
1. Advanced technology and adaptability Digital proofing is an important part and key process link of a modern digital prepress system. It can simulate and match current printing, gravure, emboss, flexo, screen printing and Other printing methods. Reproducing the color and depth of the network and graphics, eliminating the drawbacks of not printing the way in the traditional proofing must first establish a non-linear transfer process between different printing methods, to meet different users, different requirements and different printing conditions proofing The quality requirements, so digital proofing has a wide range of technological advancement and adaptability.
2, fast and low cost digital proofing can be pre-press graphic processing to produce a good layout, direct proofing output, reduce 7 traditional proofing in the film, printing version, development and other proofing preparation links, can get proofs in a very short period of time , Improve the production efficiency and meet the user's time requirements. Moreover, the equipment for digital proofing is only one-half to one-fourth of the traditional proofing. It has a small footprint, low material consumption, and easy maintenance of the equipment. It also reduces RIP and labor time, film output and plate consumption, and increases the layout. The measures for modifying the content of the text have a much lower comprehensive cost than traditional proofing.
3. Good quality and repeatability The true digital proofing uses a RIP explanation and multiple outputs. The system equipment and software are all digitally controlled, which reduces the technical requirements for the process, equipment, environment, and personnel. The quality of output proofs is stable and repeatable. Sex is much higher than traditional proofing.
4. Convenient and reliable operation The digital proofing adopts all-digital computer control, reduces the operation procedures and human intervention, and can realize the data production, standardization and standardization of production operations. As long as the user's requirements and specifications print, it can ensure the output proofs. Consistent quality, which can avoid the traditional proofing by the film, printing, development, ink and other factors such as balance, to avoid the traditional proofing of the highly dependent on personnel technology.
Third, BlackMagic and its technical characteristics BlacKMagjc is the latest digital proofing system from Serendipity Software introduced by Beijing Gaoshu. The digital proofing system first adopted the color management and matching control technology that integrates the traditional color control theory with the modern ICC color matching theory in the world, free from the high dependence of other digital proofing systems on high-precision color data acquisition instruments. Reduce the successive approximation process of color matching of printing proofs and printed proofs, making users easier to grasp, more convenient to use, more accurate in communication, more reliable in quality, and lower in cost. Its main features are:
1, advanced technology control accuracy The current digital proofing system mostly uses ICC color management to achieve color matching, and its accurate color matching is completely dependent on the price of more than ten dozens of thousands of yuan of high-precision color data collection equipment spectrophotometer, color Matching must adopt a successive approximation approach, through a variety of different printing methods, printing conditions, and the color of printed materials after several matching experiments, and can meet the requirements of multiple users of quality and technology. The user can grasp the application of the software in a short period of time, establish control parameters that can be used for production, and obtain proofs of satisfactory quality.
2. Full-featured and adaptable BlackMagic has many technologies and functions that can meet the needs of digital proofing, image output, and high-precision poster printing. Its adaptability to processes, equipment, materials, and users is strong. The main concerns are:
(1) Color Management: The system supports both ICC color profiles for displays, printers, and color matching functions; support for visual space, relative color space, absolute color space, and color saturation compensation; support for RGB, CMYK, and six-color printers ICC color profile; also covers the ability to select black dots to achieve black; color lookup table system can be used for density adjustment and gray balance adjustment; also can achieve high light, midtone, dark tone level control; can simulate four-color printing Dot dot enlargement for spot color curves with spot color printing; enables quick adjustment of brightness control in the density range; color alternatives can automatically replace the color defined by the user on any color plate.
(2) Spot color support: Supports any spot color input in spot color settings in CMYN, LAB, and color space that meets color industry application standards.
(3) De-Networking: Built-in can eliminate the de-network function derived from high-quality output screen bitmaps; Real-network point technology (RDT) can maintain the screening from RIF to proofing; fast de-networking mode can also quickly check Proofing progress.
(4) Screening technology: Various screening modes supporting high-quality proofing output, such as: Postscript Level 1 (postscript Level 1), postscript Leve7 3, random screening, fast stochastic screening, and Error diffusion screening.
(5) Resampling: The built-in resampling algorithm can achieve high-quality proofing without bitmaps, and supports nearest neighbor, bilinear, bicubic, and filter methods.
(6) Automatic page removal: It can output any imposition file automatically after it is decomposed on a small format printer.
(7) Transmission of RTP files: EFP file transfer and network disk imaging provide file sharing for Windows NT, Windows 2000, Linux, Solaris, Irix.
(8) Load balancing of printers: Allows printers of different types and sizes to print in clusters. Cluster printing can automatically distribute print jobs to multiple printers.
(9) Automatic proofing, remote proofing and analog proofing proofing: When RIP interprets the document, it can automatically carry out proofing including spot color version, allowing to set the type of the smallest page and material to be printed; the output format of the provided document can be used Remote proofing with color management can be used in conjunction with BLACKMAGIC BUREAU without affecting the effect of remote proofing; use of built-in analog proofing can be controlled as if it were actually printed on a proofing machine. The increase or decrease of the current task can also change the color (even spot color) of the color plate.
(10) Imposition: It is possible to automatically combine multiple proofing pages on the print surface to reduce paper waste.
In addition, BlackMagjc has the following additional features:
(1) Before splicing maps to make large-format posters.
(2) Pages can be automatically rotated 90o, 180o, 270o, and auto images to save printed materials.
(3) The output resolution ranges from 10dpi to 10,000dpi, the zoom range is from 10% to 4000%, and the drawing is automatically scaled to fit a specific web size; horizontal and vertical distortion adjustments can compensate for printer instability.
(4) Optimize the antialiasing function of character quality.
(5) It can realize proofing of automatically generating engineering blueprints.
(6) It can automatically generate a color mark and place the frame line and marking line outside the print format.
(7) Additional tasks and data processing information can be added to printed samples.
(8) Processing advanced schematic diagram display, print preview and one RIP, multiple prints.
(9) Ability to set task priorities; Ability to query, process, and print files simultaneously; Drive multiple printers at the same time, unlimited device and user scalability.
(10) Supports double-sided printing, which can be cropped; can print pages horizontally and vertically in the paper; and can set print page parameters in documents, apple-derived prints, and Windows printers.
3. Openness and wide application area BlackMagic adopts an Internet-based network technology structure and fully supports the file data format, printing device, and output format of the PC/Mac operating system in the field of publishing and printing. The supported operating systems include Windows NT and Windows. 2000, SGI Irix 6.5 or above, Solaris2. 51 or above, Red Hat Linux 6.2 or above. Supported input file data formats are: Agfa Tajpan, Barco Flex/FastRIP, Copydot/DCS2.0, Crosfield Magnarip/Celix/Stiudio, Contex PrePres (ALC), Fuji Celebra/worklow, Harlequin (FGB/TIFF), Heidelberg Delta, Hyphen Pack 16, PCC (PSTI) Rampage (CTR), Scitex Brisque/PMS 5.0/Impose/ps2, Single bit TIFF workflow. Supported printers are: Agfa Sherpa, GalComp CCRF/TecaJet/CrystalJet, Cannon BJC 8500/600/800, Encad NovaJet, Epson 7000/7500/ 9000/9500/10000/1520/3000/5000, Fuji FirstProof, HP1055/2000
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