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Print Standards

Celebrate! - the days of proofs that everyday printers can't match are over. ISO 12647 has driven the nail firmly into that coffin.

ISO 12647-1 : Parameters and measurement methods
ISO 12647-2 : Offset lithographic processes
ISO 12647-3 : Coldset offset lithography on newsprint
ISO 12647-4 : Publication gravure printing
ISO 12647-5 : Screen printing
ISO 12647-6 : Flexographic printing
ISO 12647-7 : Proofing processes working directly from digital data

At Colour Proofing we offer proofs to ISO 12647-2, ISO 12647-3 and ISO 12647-4 which cover sheetfed litho, heatset web litho, newsprint and gravure printing processes. All of our Proofs are produced to Fogra standards using CGS RIP software driving Epson printers with Ultrachrome inks, now the proof of choice for printers.

The Fogra standards cover the various printing processes on the various stocks as specified by ISO 12647 : Graphic technology - Process control for the production of half-tone colour separations, proof and production prints.

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Conversion Profiles / Proof Standards / TAC

Below you will find the recommended separation profiles for the relevant print/proof standard and stock. All profiles are available free of charge from European Color Initiative www.eci.org.

ISO 12647-2 Offset Lithographic (sheetfed / web)

Process Stock Profile Proof TAC
Sheetfed Type 1 ISOcoated_V2_eci.icc Fogra 39L 330
or  ISOcoated_V2_300_eci.icc Fogra 39L 300
Sheetfed Type 2 ISOcoated_V2_eci.icc Fogra 39L 330
or  ISOcoated_V2_300_eci.icc Fogra 39L 300
Web Heatset Type 3 PSO_LWC_Improved_eci.icc Fogra 45L 300
Web Heatset Type 3 (yellowish) PSO_LWC_Standard_eci.icc Fogra 46L 300
Web Heatset Type 4 PSO_Uncoated_ISO12647_eci.icc Fogra 47L 300
Web Heatset Type 5 ISOuncoatedyellowish.icc Fogra 30L 320
Web Heatset Improved Newsprint PSO_INP_Paper_eci.icc Fogra 48L 320

ISO 12647-3 Coldset Newsprint

Process Stock Profile Proof TAC
Coldset Web Newsprint ISOnewspaper26v4.icc IFRA26v4 240

ISO 12647-4 Gravure

Process Stock Profile Proof TAC
Roto Gravure LWC standard PSR_LWC_STD_V2_PT PSR_LWC_V2 300
Roto Gravure LWC Plus (HWC) PSR_LWC_PLUS_V2 PSR_LWCPlus_V2 300

Other relevant standards in print:

ISO 2846-1: describes ink color and transparency.
ISO 3664: defines lighting conditions for viewing color copies and their reproduction.
ISO 15930-X: (PDF/X) for data exchange in print production.
ISO 15076: ICC color profile format.
ISO 12640: for the data format from which ICC profiles are calculated.

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PDF Production

PDF is many things to many people with many wonderful features and options… unfortunately many of which can cause problems in the world of print which is why we strongly recommend that you supply PDF/X-1a…

PDF/X-1a is designed to provide the most robust and least flexible delivery of PDF content data. It requires that the color of all objects be expressed in CMYK or spot colors, all prepared for the print conditions under which the final press-work will be run. Elements in RGB and Lab color spaces or tagged with ICC profiles are prohibited. It also requires that all fonts used in the job be embedded in the supplied PDF file and disallows the use of transparency and layers (optional content). This format is generally recognised as the defacto standard in thje print industry and is the least likely to lead to any surprises when processed by your printer.

Further unstructions on creating and working with PDF/X-1a can be found at www.gwg.org and www.ppa.co.uk. Set up files for Adobe InDesign and Quark Xpress can be downloaded at www.ppa.co.uk.

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Tips and Hints

General

Document

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Common Mistakes

Most PDF errors can be easily avoided by following the pass4press guidelines. Utilise the downloadable presets in combination with the correct colour profile for the job. Even though pass4press v10 concentrates on InDesign CS4 and QuarkXPress 8, older versions of both can export PDF/X-1a. You can also make a PDF/X-1a file from a PostScript file – something that can be created on any computer with a PostScript driver and a copy of Adobe Distiller installed. If you're using a non-standard app, try and match the guidelines in this brochure as closely as you can, but be realistic about the software you're using: no matter how hard you try, a print PDF is going to be difficult to create from some packages.

PDF/X Errors

If you have a PDF which hasn't been output to the PDF/X-1a standard it can look like it's riddled with problems. Just re-exporting with the PDF/X-1a box ticked will usually remove most of the errors. The Output Intent is a key part of creating a PDF/X-1a and has to be there for the file to be valid, even though it is in effect just informational. A PDF/X-1a contains 'flat' CMYK: the Output Intent field tells the receiver what profile you used to export the PDF and how its content was theoretically prepared; it demonstrates that you've followed the correct spec. The Output Intent is set in the Output tab in InDesign or via the Output Colour Setup in XPress. When you open the PDF/X-1a in Acrobat and view the Output Preview, the Output Intent profile is displayed by default at the top of the window.

Document Creation

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