Transcript Prepress Tutorial CIP4/GATF

Welcome
Prepress
Koen Van de Poel
Chairman Origination&Prepress WG @ CIP4
Technology Staff @ AGFA
Today’s Agenda
• Introduction
• Creating the Ticket
• Gray Boxes
• Processing
• Output: Proofs, Plates, Ink key settings
• Digital Printing Imposition
Position
Customer
Print Manufacturing
Creating the Ticket
Life of a Job Ticket
• First for estimating purpose
– by CSR or estimator / or submitted
– only details that have influence on cost are
specified (no color names, no content)
• If accepted, upgraded to production ticket
– by production planner or CSR
– more details added (final devices, scheduling)
• Updated later with prepress details
– color names, exact number of pages, content
references
MIS
Estimating
Production
Planning
Production
Controller
Press
Controller
Prepress
Controller
Trapping
ImageSetting
Legend
Controller
SW Device
ProoferA
PlateSetterB
HW Device
Known at Creation
• Info available when MIS creates prod. ticket
• administrative and job info
• product nodes (part structure) and layout:
binds info to sheets
• imposition, number of pages
• number of colors for each sheet side
• processes: gray boxes
Missing
• Some info is often missing when the job is
created because:
• Content (PDF) arrives later
• PDF is needed to extract Spot color names
• Number of content pages for Cover often doesn't
match description: 2 pages are combined in one
Introduction to Prepress
Steps in Prepress
• Creative part
• Prepress preparation (page level)
– preparing content files ready to RIP
• obtaining content files
– preparing imposition
• Production prepress (sheet level)
– RIP
– Proofs
– Plate making and Preview for ink key
Workflow
PrePressPreparation
Gray box
ImpositionPreparation
Gray box
Plate Making
Gray box
Prepress Preparation
• Goal: no errors or interactions in prepress
production part (except mapping colors)
• Steps for content (not in order)
–
–
–
–
–
–
obtaining content files (Asset Transfer)
conversion from native to standard formats
trapping
creating production quality standard formats
preflighting / fixing files
page proofs / approvals
Imposition Preparation
• Activities needed to create a description of
where the pages and marks need to go on
the sheet resulting in the Layout
Production prepress
• Controlled environment
– nearly fixed processing times
– few operator interventions/errors if well prepared
– scheduling possible for plate making
• Includes Imposition Proof
– often needed before starting plate making
– internal or external (takes extra time) approval
Parts
Prepress
Brochure
Product
Cover
Body
Black&White
Prepress
Color
Process
16 pp
2x
8 pp
In and Outs
• In
– job ticket (+imposition info)
– content files
• Intermediate
– Proofs (hard copy or soft proof)
• Out
– plates (film)
– previews for ink key settings (ex PPF)
Building a Workflow
Gray Boxes
• Easy way to let MIS define what prepress
should do
– PrePressPreparation, ImpositionPrepreparation
– PlateMaking, xxProofing
• MIS provides
– input : available job info, more or less detailed
– output: detailed info (sheet structure, plates,
components)
• Prepress operator (or defaults) will fill in
remaining details
Drawing
Nr of
pages
Stripping
Gray Box
“PrePressPreparation”
Gray Box
“ImpositionPreparation”
RunList
content
Layout
Marks
Gray Box
“PlateMaking”
Preview
Plate
Separations
Media
PrePressPreparation Gray Box
In/Out PrePressPreparation
• In
– indication of nr of pages
• can be different from what prepress needs
• Out
– populated RunList
Snippet Node
<JDF Type="ProcessGroup"
Types="PrePressPreparation"
Category="PrePressPreparation" …">
<ResourceLinkPool>
<RunListLink rRef="R0_I" ProcessUsage="Document"
Usage="Input"/>
<RunListLink rRef="R0_D" ProcessUsage="Document"
Usage="Output"/>
…>
Snippet Input RunList
<RunList Class="Parameter" ID="R0_I"
Status="Available" NPage="6"/>
<RunList Class="Parameter" ID="R0_D"
Status="Incomplete"/>
ImpositionPreparation Gray Box
In/Out ImpositionPreparation
• In
– Stripping resources
– If not available, operator intervention
• selecting a template
• recommended to give Instruction Comment
– JDF 1.3
• reference to external template
• Out
– Completed Layout
– References to Marks
Stripping
• High-level imposition related information
from MIS to Prepress
• avoids redoing imposition 3 times:
– Estimating
– Production planning
– Prepress
• allows bi-directional communication:
prepress updating imposition info
Sample: Stripping
Sheet
BinderySignature
Pages / Cells
<StrippingParams …>
<BinderySignature FoldCatalog="F8-7"/>
<Position RelativeBox="0 0 0.5 1"/>
<Position RelativeBox="0 0.5 1 1"/>
</StrippingParams>
Snippet ImpoPrep
<JDF Type="ProcessGroup" Types="ImpositionPreparation"
Category="ImpositionPreparation">
<Comment Name="Instruction">Imposition: folder with 6
pages folded using F6-1, WorkAndTurn</Comment>
<ResourceLinkPool>
<LayoutLink rRef="LAY000" Usage="Output"/>
<RunListLink rRef="RNL000_M" ProcessUsage="Marks"
Usage="Output"/>
</ResourceLinkPool>
</JDF>
Snippet Layout
<Layout …">
<Signature Name="SIG1">
<Sheet Name="SHT1">
<Surface Side="Front"/>
<Surface Side="Back"/>
<MediaRef rRef="PAPMSVA_880x630"/>
</Sheet>
</Signature>
<Signature Name="SIG2">
<Sheet Name="SHT2">
<Surface Side="Front"/>
<MediaRef rRef="PAPMSVA_880x630"/>
</Sheet>
</Signature>
</Layout>
Imposition in Digital Printing
Imposition in digital printing
• Generates an imposition Layout from high level parameters
• Useful for digital printers with integrated prepress
• Supports controls for specifying
– Multi-up regular grid of page cells
– Scaling and rotation of reader pages for page cell mapping
– Single sided or perfected (head to head/foot) sheets
– Auto generation of sheet marks and slug lines
– Page distribution schemes for saddle, and perfect binding
– Sequential cut block distribution (i.e. cut and stack post cards)
• Control for vert, horiz, and stack wise distribution of cut blocks
– Independent horiz/vert gutter spacing and creep compensation
– Document and cut block step and repeat
– VDP document ganging
LayoutPreparationParams
• NumberUp
– Rows and columns of PageCells
• PageDistributionScheme
– Distribution of PageCells over NumberUp (Saddle, Perfect, Sequential)
• PresentationDirection
– Distribution of pages into NumberUp (FoldCatalog, XYZxyz)
• Sides
– OneSidedFront, OneSidedBackFlipX/Y, TwoSidedFlipX/Y
• FinishingOrder
– GatherFold, FoldGather, FoldCollect, Gather
• StepRepeat
LayoutPreparationsParams
• ImageShift
• InsertSheet
• FitPolicy
• PageCell
– Border, Color
PlateMaking Gray Box
In/Out Platemaking
• In
– Media (plate)
– Colors
– RunLists
• document (content)
• marks
– Layout
• Out
– Ink key setting preview (PPF)
– ExposedMedia (plate)
Snippet PlateMaking
<JDF Type="ProcessGroup" Types="Imposition RIPing
PreviewGeneration ImageSetting" Category="FinalImaging" … >
<ResourceLinkPool>
<RunListLink rRef="R0_D" Usage="Input" ProcessUsage="Document"/>
<RunListLink rRef="R0_M" Usage="Input" ProcessUsage="Marks"/>
<LayoutLink rRef="LAYBody01" Usage="Input"/>
<ColorantControlLink rRef="ColorantControl" Usage="Input"/>
<MediaLink rRef="Plate000001" Usage="Input"/>
<ExposedMediaLink rRef="ExposedMedia" Usage="Output">
<Part SignatureName="SIG1" SheetName="SHT1"/> …
<PreviewLink rRef="Preview" Usage="Output">
<Part SignatureName="SIG1" SheetName="SHT1"/>…
…
References
• JDF 1.2 spec
• MIS-Prepress ICS
• MIS-Prepress Samples
– Minimal, (Proof)PlateMaking
– Complex (multi part, ConvPrint)
• Proofing Application note
Thanks for Listening