SIST ISO 12647-7:2008

SLOVENSKI STANDARD
01-junij-2008
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Graphic technology - Process control for the production of half-tone colour separations,
proof and production prints - Part 7: Proofing processes working directly from digital
data
Ta slovenski standard je istoveten z:
ICS:
37.100.01 *UDILþQDWHKQRORJLMDQD Graphic technology in
VSORãQR general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 12647-7
First edition
2007-12-15
Graphic technology — Process control
for the production of half-tone colour
separations, proof and production
prints —
Part 7:
Proofing processes working directly from
digital data
Technologie graphique — Contrôle des processus de confection de
sélections couleurs tramées, d'épreuves et de tirages —
Partie 7: Processus d'épreuve travaillant directement à partir de
données numériques
Reference number
©
ISO 2007
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ii © ISO 2007 – All rights reserved

Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 2
4 Requirements . 2
4.1 Data files, simulation of screens. 2
4.2 Proof print. 3
5 Test methods. 6
5.1 Control strip . 6
5.2 Additional test objects . 7
5.3 Colour measurement. 7
5.4 Measurement of tone values by tristimulus colorimeter or spectrocolorimeter . 8
5.5 Measurement of gloss. 8
5.6 Visual appraisal of proof-press-print matches . 8
Annex A (normative) Certification . 9
Annex B (normative) Rub resistance of the proof colorant. 11
Annex C (normative) Outer gamut patches. 15
Annex D (informative) Organizational certification routines for visual appraisal of proof-print
press-print matches. 18
Bibliography . 20

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 12647-7 was prepared by Technical Committee ISO/TC 130, Graphic technology.
ISO 12647 consists of the following parts, under the general title Graphic technology — Process control for
the production of half-tone colour separations, proof and production prints:
⎯ Part 1: Parameters and measurement methods
⎯ Part 2: Offset lithographic processes
⎯ Part 3: Coldset offset lithography on newsprint
⎯ Part 4: Publication gravure printing
⎯ Part 5: Screen printing
⎯ Part 6: Flexographic printing
⎯ Part 7: Proofing processes working directly from digital data

iv © ISO 2007 – All rights reserved

Introduction
Part 1 of ISO 12647 serves to provide definitions, the general principles, the general order, the material to be
covered in the subsequent parts 2 to 7 of ISO 12647, the definition of the data, the measurement conditions
and the reporting style.
This part of ISO 12647 relates to the subject of digital proofing and establishes proofing requirements for the
most stringent part of the printing and publishing market.
This part of ISO 12647 mainly lists values or sets of values, and their tolerances, of the primary parameters
specified in ISO 12647-1, especially for digital proof printing. Primary parameters that define a printing
condition include the screening parameters, where applicable, the colours of the solids, the colour of the print
substrate, colours intermediate between these and the tone value increase curve. Adherence to these values
essentially ensures that a grey, which at the colour separation stage was composed for a particular printing
condition, also prints as a grey colour in proofing and printing. Remaining deviations from grey due to
differences in trapping can then be removed by adjusting the coloration within the tolerances provided. This
part of ISO 12647 further specifies test methods for those properties of digital proof prints and their substrates
that are considered relevant for stable and reliable conditions, and thus for a certification procedure.
The graphic technology industry makes extensive use of proofing to predict the rendering of digital data files
by a wide variety of high-definition, high-quality off-press printing processes and applications. Each such
prediction is based on a characterization data set that defines a particular printing condition.
Typically, the specified printing condition is defined through an International Color Consortium (ICC) profile or
the associated characterization data set, both of which relate source data and colorimetrically defined printed
colour. Such data may be derived from printing conditions conforming to the pertinent process standard of the
ISO 12647 series by industry trade groups or individuals.
The purpose of a proof print is to simulate the visual characteristics of the finished production print product as
closely as possible. In order to visually match a particular printing condition, proofing processes require a set
of parameters to be specified that are not necessarily identical to those put forward in ISO 12647-1 or another
part of ISO 12647. This is caused by differences in colorant spectra or phenomena such as gloss, light scatter
(within the print substrate or the colorant), and transparency. In such cases, it is also found that
spectrocolorimetry takes precedence over densitometry.
Another problem area is the matching of a double-sided production print on a lightweight printing substrate,
such as often used in heat-set web and publication gravure printing, to a digital proof on a nearly opaque
substrate. If the proof was produced using a colour management profile based on measurements with white
backing, there will be an unavoidable visual and measurable difference between the proof on the one hand
and the production print placed on black on the other hand. A black backing is required for double-sided
production printing on non-opaque prints, as specified in the pertinent parts of ISO 12647. The possible
occurrence of such differences needs to be well communicated, in advance, to all parties concerned.
Historically there has been no consistency in the way that either the characterization data or the criteria and
limits for a satisfactory match have been provided. This has led to significant redundancy and inconsistencies
in the evaluation of proofing systems for different, but similar, applications, and a cost and time burden on the
industry. This International Standard therefore attempts to provide guidance in this area by providing
specifications and associated testing procedures.
Annex A gives the requirements for the digital proof prints listed in the main body of this part of ISO 12647;
these are weighted with respect to their relevance in two typical situations:
⎯ requirements with which a proof print, made for a particular printing condition, must comply if it is to be
referenced in a contract between the printer and the provider of the digital data (“Certified Proofing
System”);
⎯ requirements with which a vendor's proofing system, comprising hardware and software, must comply if it
is to be considered capable of reliably producing digital contract proofs for a particular printing condition
(“Certified Proofing System”).

vi © ISO 2007 – All rights reserved

INTERNATIONAL STANDARD ISO 12647-7:2007(E)

Graphic technology — Process control for the production of
half-tone colour separations, proof and production prints —
Part 7:
Proofing processes working directly from digital data
1 Scope
This part of ISO 12647 specifies requirements for systems that are used to produce hard-copy digital proof
prints intended to simulate a printing condition defined by a set of characterization data. Recommendations
are provided with regard to appropriate test methods associated with these requirements. In addition,
guidance with respect to the certification of proofing systems related to specific printing condition aims is also
included.
This part of ISO 12647 is independent of the method used to produce a digital proof print.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 3664, Viewing conditions — Graphic technology and photography
ISO 8254-1, Paper and board — Measurement of specular gloss — Part 1: 75° gloss with a converging beam,
TAPPI method
ISO 12040, Graphic technology — Prints and printing inks — Assessment of light fastness using filtered
xenon arc light
ISO 12639, Graphic technology — Prepress digital data exchange — Tag image file format for image
technology (TIFF/IT)
ISO 12640-1, Graphic technology — Prepress digital data exchange — Part 1: CMYK standard colour image
data (CMYK/SCID)
ISO 12642-2, Graphic technology — Input data for characterization of 4-colour process printing — Part 2:
Expanded data set
ISO 12647-1:2004, Graphic technology — Process control for the production of half-tone colour separations,
proof and production prints — Part 1: Parameters and measurement methods
ISO 13655:1996, Graphic technology — Spectral measurement and colorimetric computation of graphic arts
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