In the digital printing process, the easiest way to proof a job is to print and proof on the same machine. This technique is called "digital wet proofing." Its advantage is that it can ensure that the proofs are exactly the same as the final prints, and the cost is relatively modest. But what if the operations are constantly changing? Staff cannot waste a lot of time watching the proofs flow out one by one on the machine. You certainly do not want to find problems on the 5000th proofs, but the front ones are wasted.
It is certainly not necessary to look at each print. All that needs to be done is to confirm that the job is acceptable by using enough samples or a representative database. For example, you can create a job with long, short text, and images of different sizes, and then test the perimeter of the job. So why not test the proofs on the monitor instead of the printer? PDF files allow you to do this.
Streamlined PDF Samples A complex variable data workflow usually contains multiple image layers. Depending on the software used, these text or image layers are saved in one or two file formats, which are then flattened and passed to the print driver at a nominal rate. Generate assembly files that exist in Postscript or PDF format instead of passing these data directly to RIP and printers. Although users can integrate pages and layers on the press, this method can preview the final results in advance.
With the help of PDF Express developer Think121, Canopy has created PDF ProofStreamer, which displays each merged PDF page. In ProofStreamer software, all text and image PS layers are refined into Acrobat files. Then, these PDF layers are placed in the same way into the print manager, merging all elements, page by page, and using the same electronic job ticket to control fusion and grouping. ProofStreamer is based on PDF technology that simulates data fusion, layering, collation, and grouping to build simple proofs for all single jobs. PDF proofs are almost identical to the final digital press.
How does PDF ProofStreamer work? It allows the pages (or templates) that exist in PDF format to be used in variable data print jobs. Designers can also use one or more files for multiple pages as a background. The background varies in size and direction.
In the variable data printing process, a PDF output file with single or multiple background pages is integrated. These background pages are selected from the main file. They can be added to the output data stream in groups. When each page is added, the changed text and images are integrated into each page.
Using a variety of variable data production tools, you can generate separate PS or PDF layers, such as the PDF Express tool, which is an Acrobat plug-in that can directly integrate variable data into PDF files. On the press, the integration of background, style, and personalized content is controlled by electronic job ticket files.
So why must use PDF workflow for proofing? Here are some unquestionable reasons:
1. Soft Proofing - Formed PDF files are very easy to transmit on a cross-platform network. Transmitting PDF data on different networks is as simple as sending e-mail attachments. Production managers, designers, vendors, and customers can see documents or printed documents on their own machines.
2. Remote Proofing - High-resolution files can be created and printed remotely on a printer with color management software to provide accurate color proofs instantly. Even these jobs can be printed directly from afar.
3. Prepress inspection - Prepress and variable data printing operators can identify errors in documents without delaying printing time or risking problems. It can also estimate paper waste and color errors.
4. Prepress Confirmation - One of the fears of designers of variable print jobs is that the elements of fusion cannot be placed exactly where it should be, either large or small. In preparing a complex variable data job, the operator needs to confirm that the contents of each layer can be exactly blended and can be exactly aligned with each other. Creating an accommodating PDF file can be done offline without taking the press time or causing any waste.
5. Build verification - Many variable data print jobs use the build capabilities of the design software to create jobs for each page and wait for the machine to print. Occasionally there will be only 8 pages after a 9-page job group version. PDF proofing allows the operator to preview and confirm the correctness of the build. Usually most customers do not see the situation of the group version, they see only a single page situation.
6. RIP Positioning Confirmation - Incorrect RIP settings may cause the paper to be printed outside the paper. However, since the PDF file is created, the same RIP settings will be used in the specified job, and the position of the image will be checked by PDF.
7. Style validation - We can create data for the entire print job (possibly 5000 pages) or limit the final PDF file to contain only styles, possibly only one style. The check of the style ignores the so-called "personalized layers" and the styles on each proof are the same. Such a designer can really watch all the variable jobs without previewing the files page by page. Its completion is accomplished by evaluating the database and picking items that may affect the layout. In the future, PDF ProofStreamer may be automatically completed.
8. Data Security and File Integrity - Many organizations (such as an investment company) may not give up control of the customer database. Instead of submitting confidential databases to printers, they create, produce, and proof a complex variable data job at their own organization's printing house. The entire job can be checked, sampled, and signed by the user for remote printing. When all the content is set up, simply send the PDF print file and provide the details of the specific parameters to the printing shop for printing, binding, and packaging. As a result, some sensitive information is protected, printers cannot access a pure database, and the integrity of information is protected.
9. Operator Training - The operator can gain valuable experience in preparing the job without spending precious time on the press. Students can use distance learning to proofread variable data print jobs without wasting a sheet of paper.
Summary: We have found that our customers need a more efficient way to proof their variable data jobs and that they do not want to take up valuable press time. They need a secure way to protect their data and are free to enter their remote on-demand printing shop. They also require more efficient training of prepress people who print with variable data and do not want to influence the output of printing. PDF proofing with ProofStreamer developed for Acrobat makes the job creation process and learning how to create short print jobs and variable data printing processes more economically.
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