PDF workflow (below)

1. Acrobat Distiller can convert Postscript into PDF files while keeping the print control parameters in the original Postscript in the PDF file. In the color and monochrome print production workflow, people originally used a certain version of software to write a file, edited and converted to Postscript file output. This Postscript comment output file also has some printing control parameters. Typically, this Postscript file is converted to a PDF file by Acrobat Distiller software consisting of Acrobat 3.0. Acrobat 3.0 has a portable color processing function. In addition to the contents of the file, these print control parameters are also retained during conversion. In PDF files, of course, PDF files can also be written directly from other systems. Regardless of where the PDF file comes from, once these features are preserved and determined within the PDF, they all return to the Postscript language system when the RIP is output, and the original printing controls continue to exist. This happens automatically in Acrobat 3.0 and can be used in any system with direct output PDF files.
2. Acrobat Exchange can convert from PDF to Postscript for output, and the print control parameters retained in the PDF file are returned to PostScritp. For Mac, the new Acrobat Exchange component of Acrobat 3.0 has the Export Postscript or EPS menu item. This option allows the user to output EPS and retain the color needed for inputting software (such as Adobe PageMaker, Adobe IIIustrator, or QuarkXPress) for color separation. Information. Originally printed control features in Postscript files are stored in PDF files when converted to PDF files by Acrobat Distiller. When printing from Acrobat Exchange (or Acrobat Reader) to Postscript, these print control features are included in Postscript. In other words, if the user determines screening characteristics in the composition software, when Postscript is converted to PDF by Distiller... Then When converted to Postscript output, it is processed as part of the Postscript technology stream.
2. Acrobat Exchange's editing function means that if output, a typographical error is found in the file, it can be easily modified using Acrobat Exchange or use TouchUP or other soft plugins (such as EnFocus PitStop) before being output to a Postscript device. 1.1) Do text editing.
PDF Prepress Workflow Based on Acrobat 3.0 Given the advantages of PDF as a “numeric character” in workflow and PostScirpt is the best page description for output so far, people will naturally combine the strengths of the two talents. Create different characteristics of the workflow.
Postscript-PDF-Postscript prepress workflow Due to the many types of PostScirpt files generated from different applications and unpredictability, people thought of using the PostScirpt-PDF-PostScirpt conversion process to create a predictable PostScirpt language file. Either export it directly to print or enter another prepress workflow. This prepress workflow is that when a document completed by the groupware software enters the printing factory or the export center from the user, and the export center morally uses this groupware to convert the completed file into the PostScirpt language file and reuse it. Acrobat Distiller converts PostScirpt to PDF (in the process, different PostScirpt generated by different software will be converted to a single standard PDF, optionally removed from the file), viewed as a soft proof (or using Acrobat 3.0's Exchange with Soft plug-in editing changes), or other prepress processing, and then use Acrobat Exchange 3.0 to convert to PostScirpt language. Note that the PostScirpt converted from PDF at this time is different from PostScirpt previously generated by the build software. PostScipt converted from PDF is already a predictable and reliable Postscript file, ready to be processed by RIP or other prepress software. .
This approach is for drivers that don't match one another, that is, the sequel to the ostScirpt file. The technique of processing PostScript to PDF and then returning to Postscript allows the output center to obtain accurate, predictable PostScirpt files.
Workflow with PDF file transfer When more users become familiar with Acrobat's features and more applications support Acrobat, printers will go ahead with PDF as a standard for printing documents. Instead of asking for a copy of the software format or Postscript file, they asked to provide PDF files directly from their customers.
The designer used the groupware to make a document that includes a low-resolution EPO image (the abbreviation of For Placement Only, meaning only for the intended use; the high-resolution image can be scanned from the photo in the pressroom. And stored in the printing room, do OPI image substitution at the time of output); then use Acrobat Distiller 3.0 to convert the file to PDF file, at this time any printing control features made in the composite software are kept in the PDF file, of course not The OPI description is also included in the PDF file. High-resolution images are added back to the file when the OPI processing is performed before being sent to the RIP. This reduces the amount of time required and the work required for the transfer of PDF files with a small amount of information to flow through each link of the workflow. the amount. The print shop receives this PDF file, uses Acrobat Exchange 3 for preflighting and last minute text editing, and converts the file back to a PostScirpt review file, retaining the print controls defined in the original groupware. High-Res. Lmage stored in the print shop After the OPI replacement, the Postscript file is output for final printing.
One advantage of using PDF to transfer files is that Postscript files made from PDF are more reliable and predictable than the original Postscript files. A Postscript-based workflow usually refers to the production process we currently know, which is the basic file format that uses the Postscript file itself for delivery and export, and the PDF-based workflow uses the PDF format to deliver and prepare files. The benefits of the PDF workflow are the flexibility of the PDF format to simplify and integrate the entire workflow. In this case, the Postscript file is only used as a form of service for generating PDF files. After all PDF-based prepress processing steps are completed, Postscript is used to output print jobs. There is actually no need to choose between Postscript and PDF, and each one has its own purpose and role.
It is a big step forward to deliver customer documents in PDF format to the printing shop, but the future of PDF in print production will go further. Currently, PDF files can be continuously updated, and some special information such as traps and layout layouts can be added to PDF files throughout the entire process without having to re-create the entire file. In the future, users will be able to output PDFs directly to the groupware software without the intermediate step of exporting to Postscript.

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