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Variable-data printing (VDP) (also known as variable-information printing (VIP) or VI) is a form of digital printing, including on-demand printing, in which elements such as text, graphics and images may be changed from one printed piece to the next, without stopping or slowing down the printing process and using information from a database or external file.〔(【引用サイトリンク】url=http://www.efi.com/documents/promo/abc/ABCs_VDP_Letter.pdf )〕 For example, a set of personalized letters, each with the same basic layout, can be printed with a different name and address on each letter. Variable data printing is mainly used for direct marketing, customer relationship management, advertising, invoicing and applying addressing on selfmailers, brochures or postcard campaigns. ==Variable Data Printing== VDP is a direct outgrowth of digital printing, which harnesses computer databases and digital print devices and highly effective software to create high-quality, full color documents, with a look and feel comparable to conventional offset printing. Variable data printing enables the mass customization of documents via digital print technology, as opposed to the 'mass-production' of a single document using offset lithography. Instead of producing 10,000 copies of a single document, delivering a single message to 10,000 customers, variable data printing could print 10,000 unique documents with customized messages for each customer. The returns for variable printing vary from double the normal return at the basic level to 10-15 times the return for fully variable jobs. This naturally depends on content and the relevancy of that content, but the technique presents an effective tool for increasing ROI on marketing campaigns. There are several levels of variable printing. The most basic level involves changing the salutation or name on each copy much like mail merge. More complicated variable data printing uses 'versioning', where there may be differing amounts of customization for different markets, with text and images changing for groups of addresses based upon which segment of the market is being addressed. Finally there is full variability printing, where the text and images can be altered for each individual address. All variable data printing begins with a basic design that defines static elements and variable fields for the pieces to be printed. While the static elements appear exactly the same on each piece, the variable fields are filled in with text or images as dictated by a set of application and style rules and the information contained in the database. There are three main operational methodologies for variable data printing.〔(【引用サイトリンク】url=http://www.digitaloutput.net/content/ContentCT.asp?P=78 )〕 In one methodology, a static document is loaded into printer memory. The printer is instructed, through the print driver or Raster Image Processor (RIP) to always print the static document when sending any page out to the printer driver or RIP. Variable data can then be printed on top of the static document. This methodology is the simplest way to execute VDP, however its capability is less than that of a typical mail merge. A second methodology is to combine the static and variable elements into print files, prior to printing, using standard software. This produces a conventional (and potentially huge) print file with every image being merged into every page. A shortcoming of this methodology is that running many very large print files can overwhelm the RIP’s processing capability. When this happens, printing speeds might become slow enough to be impractical for a print job of more than a few hundred pages. A third methodology is to combine the static and variable elements into print files, prior to printing, using specialized VDP software. This produces optimized print files, such as PDF/VT, PostScript or PPML,〔 that maximize print speed since the RIP need only process static elements once. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「variable data printing」の詳細全文を読む スポンサード リンク
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