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FLEXO Magazine : July 2009
TECHNOLOGIES & TECHNIQUES Image resolution Minimum stroke weight (which can be limited to only white text or text with multiple inks) Bleed/trim hazards Overset text (if your text box is too small and some text is missing) Font missing Missing glyphs (characters) Minimum type size The InDesign CS4 Live Prefl ight is also quite intelligent: it not only checks the objects created within the InDesign environment, it also checks placed objects. We did tests with objects (using .eps fi les) that have missing glyphs in it. When placed in InDesign, Live Prefl ight detects the missing glyph and reports this as an error. EMBEDDED PROFILES Also interesting is that you can embed the Live Prefl ight profi le in the InDesign document. This way, you can keep the document and the prefl ight profi le together. In a workfl ow where a prepress bureau or trade shop makes a template that is to be used by graphic designers, this is a great feature. The prepress bureau or trade shop creates the template and attaches the appropriate profi le, the designer doesn’t have to worry about anything. When he/she makes a mistake, an error will be given by the InDesign Live Prefl ight. The Live Prefl ight is also truly “live.” It works in the background and checks for errors continuously. When an error is corrected, it immediately shows. To check whether this has an infl uence on the performance, we did a small test with a 64-page brochure with multiple placed images and text. We didn’t really see a decline in performance when dragging text, images. When performing other actions, live prefl ight will take a bit longer, it seems that it is a process with the lowest priority. LINKED TO GWG PROFILES The VIGC has created 13 different profi les, which are linked to the profi les from the Ghent PDF Workgroup (GWG) for PDF creation and PDF prefl ight. The fi le names also refl ect the link between the VIGC and the GWG profi les. It was our intention to link to the GWG, in which the VIGC participates actively. At the last meeting of the GWG, early May in Madrid, we presented our profi les and they received a lot of interest from all the parties involved in the workgroup. The different associations represented in the GWG are now investigating and evaluating the profi les. The translation of the GWG profi les to the VIGC Live Prefl ight Profi les is not exactly one-on-one. We have seen some early Live Prefl ight Profi les from others that had a oneon-one translation, but that’s not a good idea. Let’s look at color spaces used. The GWG at this moment requires CMYK images in the PDFs. Should we therefore limit the use of images in InDesign to CMYK? No! People can of course use RGB images in InDesign, as long as they use the right color management settings and use the right PDF creation profi les. Then color management will be applied the right way and the conversion will be perfect. So we at VIGC have taken a step back when creating the Live Prefl ight Profi les. And that wasn’t always an easy thing to do. To have a secure workfl ow, the VIGC Live Prefl ight Profi les and the GWG PDF creation profi les and GWG PDF prefl ight profi les are a perfect fi t. First the design, the layout is checked in InDesign with the VIGC profi les, then a good PDF is created with the GWG PDF creation profi les. And as a quality check, the PDF is prefl ighted with the appropriate GWG prefl ight profi le, with a GWG compliant PDF prefl ight tool. CONCLUSION To create a good PDF, you need to start with a quality native document. That is why prefl ighting during design and layout is so important. With this new initiative from VIGC, people can retain quality control during the complete process, from creative to print output. With that, many problems and many costs can be eliminated along the way, which is of the utmost importance in the current economical situation. The VIGC Live Prefl ight Profi les for Adobe InDesign CS4 can be downloaded for free from the VIGC Web site: www.vigc.org. The VIGC Live Prefl ight Profi les come with two tutorial fi les that explain some important checks. At that website you can also check the list of the GWG compliant prefl ight tools. ■ ABOUT THE AUTHOR: This article was submitted by VIGC (Vlaams Innocatiecentrum voor Grafi sche Communicatie/ Flemish Innovation Center for Graphic Communication), a not-for-profi t organization that supports graphic arts companies with innovation, with the implementation of new technologies. VIGC offers trend watching services, training and consulting. Core competences are color and PDF. It is also one of the active members of the Ghent PDF Workgroup, where it performs the compliancy testing of prefl ight applications. For more information, contact Eddy Hagen, managing director and trend watcher, at email@example.com; or Didier Haazen, senior consultant at firstname.lastname@example.org. www. f le xography. org JULY 2009 FLEXO 25
Sustainable Spring 2009