pdf for packaging - ghent workgroup · pdf for packaging ... and foil application is derived from...

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PDF for Packaging (and Labels and Sign and Display and…)

Lieven Plettinck GWG Seminar October 2011

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Why Standardize?

Structural Design

Graphics Design

Production Art

Prepress

Converting

Converting

Interoperability

•  between sites

•  between companies

•  between systems from different vendors

Reduce Errors Enable Automation

PDF production master for printing and finishing

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Packaging related Standardization efforts in GWG

●  Packaging Specification ●  Non Print Contours ●  Spot Color Specification

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Non Print Contours

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Non Print Contours

•  PDF path and text objects

•  Not used to define final printing separations

•  Usually printed on proofs

•  Common practice in packaging, labels, sign and display (technical separations)

•  ..not exclusive to packaging

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Types of non Print Contours

Structural Data •  Sometimes called CAD, die lines, etc…

•  Describe how the 3D packaging element will be produced from a flat substrate •  Describe production steps in finishing (cut, fold, glue, emboss…) •  Used for folding carton, corrugated boxes, displays, label, flexible pack,… •  Generated in specialized apps, imported in the graphics app

Cut Contour Crease Contour

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Braille •  Applied during finishing (die cutter

or folder gluer) •  Ink jet


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Legend •  Informational panels

•  design identification •  customer info

•  technical details… •  Positioned outside the die line


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Dimensions •  A collection of indications (arrows,

numbers and units) indicating sizes of items in the design.


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Positions •  Indications of intended

or allowed positions for text, barcodes, holograms, etc..


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Why store non print contours in PDF?

•  Graphic Design

• Correct placement of graphic elements in relation to structure (die)

•  QC and approval

•  Usage of the correct die

•  Check correct placement of graphics in relation to die

•  Non visually impaired QC people check braille

•  Legends and dimensions give extra context

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•  Layout and tool manufacturing

•  Outer contour of 1–up is used for layout of the printing sheet or web repeat (step and repeat, nesting)

•  Position of braille elements, layout for coating blankets and foil application is derived from layout. Layout contains 1-up PDFs with needed contour data.

•  PDF for driving digital finishing

•  Cutting tables (sample making and short-run)

•  Digital laser cutters

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•  Virtual Prototypes From this… …to this

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How are non print contours stored in PDF?

Structured set of layers (OCGs)

Metadata in OCG dictionaries. Standardized vocabulary

Set of rules for coloring non print contours.

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Spot Color Specification

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What is the problem?

●  The output intent in a PDF defines process color (deviceCMYK) colorimetrically using an ICC profile. (required in PDF/X-4)

●  The alternate colorspace of a spot color (Separation Colorspace) can define

the Lab value (or the CMYK equivalent) of the 100% solid.

ICC Profile

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So what is the problem?

Spot 1

100% 100% 50%

? No tint information

50% Spot 1 + 50% Spot 2

? No transparency information

Spot 1+ Spot 2

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So what is the problem?

Spot 1 D50 Illumination

Spot 1 F2 Illumination

Spot 1 Spectral Reflectance

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Spectral Ink Data Embedded in PDF

•  SpectralInkData

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●  1 CxF blob per spot color ●  CxF is a XML format defined by XRite

–  It was submitted by XRite to ISO TC130 for standardization (ISO 17972)

●  CxF for a spot color contains spectral reflectance of number of patches of the spot color. –  Tint ramp on clear substrate –  Tint ramp over black

Spectral Ink Data embedded in PDF

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pdf for packaging - ghent workgroup · pdf for packaging ... and foil application is derived from...

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