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CIP4 Tutorial – Issues in Digital Printing
Sunday, October 7, 2007Foster City
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Issues in Digital PrintingPresenter
Steve HiebertSoftware ArchitectIndigo Digital Press DivisionHewlett-Packard Company
Alternate Chair, Digital Printing WGChair, Capabilities WGChair, Product Description WG
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Issues in Digital PrintingOverview
• Compatibility• Workflow• Prepress• Press• Post Press
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Issues in Digital PrintingCompatibility (1 of 2)
• Digital printing systems are diverse in terms of integrated capability
• DP Vendors offer equipment with varied levels of integrated prepress, press, and post press capability
• Commercial Digital Printing (CDP) ICS
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Issues in Digital PrintingCompatibility (2 of 2)
• Commercial Digital Printing (CDP)ICS– Work in Progress
– Comprises• Layout Creation Service
• Layout Creation to RIP ICS
• RIP Service
• Raster Digital Printing Service
• Digital Finishing?
– Will provide conformance options for such devices of
varying capability
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Issues in Digital PrintingWorkflow
• Workflow– Digital printing workflow, in general, has no established
“convention” as does CTP/offset • CTP and offset printing are often referred to as “conventional
printing” within CIP4
– No intermediate plates• Greater opportunity for maximizing automation of the prepress and
print production processes
• It’s all data until colorants are applied
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Issues in Digital PrintingPrepress (1 of 5)
• ColorSpaceConversion• Imposition• RIP• VDP• Photo
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Issues in Digital PrintingPrepress (2 of 5)
• ColorSpaceConversion– More likely to specify ColorSpaceModel than ICC profiles
– The dfe/press typically has pre-installed output profiles
specific to press setup
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Issues in Digital PrintingPrepress (3 of 5)
• Imposition– Smaller sheets
• Less concern about waste – E.g., A4 two-up on A3
• Usually on a simple grid, step-and-repeat
– Z as well as X,Y – business cards, cut and stack
– Data driven dynmic sheet marks (e.g. OMR, device ctrl
barcodes, etc.)• Integrety checks
• Spoilage recovery
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Issues in Digital PrintingPrepress (4 of 5)
• RIP– RIP intensive, especially with VDP
• Real-time RIP
– Often multiple RIPs to keep up with the press
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Issues in Digital PrintingPrepress (5 of 5)
• VDP– Static – no variation
– Versioned – coarse grained variation, e.g., regional issues
– Personalized – fine grained variation, e.g., marketing
collateral
– Photo – every page is different
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Issues in Digital PrintingPress
• Reduced setup– Very little “planned waste”
– Makes short runs profitable
• On press collation– Produces documents, not sheets
– Multiple media
• Reduced clean-up – not as messy– Ink-jet
– Electro-Photography• Dry toner (EP)
• Liquid toner (LEP)
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Issues in Digital PrintingPost Press
• Postpress– Need quick setup to maintain profitability
– VDP• Usually means marks, e.g., barcodes
– May need to marry covers from one press-run with
bodies from another• Color vs. black&white
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Issues in Digital Printing
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