1、BSI Standards Publication PD ISO/PAS 15339-1:2015 Graphic technology Printing from digital data across multiple technologies Part 1: PrinciplesPD ISO/PAS 15339-1:2015 PUBLISHED DOCUMENT National foreword This Published Document is the UK implementation of ISO/PAS 15339-1:2015. The UK participation i
2、n its preparation was entrusted to Technical Committee PAI/43, Graphic technology. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its
3、 correct application. The British Standards Institution 2015. Published by BSI Standards Limited 2015 ISBN 978 0 580 90003 7 ICS 35.240.30; 37.100.99 Compliance with a British Standard cannot confer immunity from legal obligations. This Published Document was published under the authority of the Sta
4、ndards Policy and Strategy Committee on 30 September 2015. Amendments issued since publication Date Text affectedPD ISO/PAS 15339-1:2015 ISO 2015 Graphic technology Printing from digital data across multiple technologies Part 1: Principles Technologie graphique Impression partir de donnes numriques
5、via des technologies multiples Partie 1: Principes PUBLICLY AVAILABLE SPECIFICATION ISO/PAS 15339-1 First edition 2015-08-15 Reference number ISO/PAS 15339-1:2015(E)PD ISO/PAS 15339-1:2015ISO/PAS 15339-1:2015(E)ii ISO 2015 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in Switz
6、erland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be re
7、quested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.orgPD ISO/PAS 15339-1:2015ISO/PAS 15339-1:2015(E)
8、Foreword iv Introduction v 1 Scope . 1 2 Normative references 1 3 T erms and definitions . 1 4 Requirements 2 4.1 Principles and assumptions . 2 4.2 Data encoding 2 4.3 Data preparation . 3 4.4 Characterized reference printing conditions and colour characterization data 3 4.5 Use selection criteria
9、for choice of characterized reference printing condition 3 4.6 Adjustment of data for substrate colour differences . 4 4.7 Alternate printing reference 4 4.8 Colour profiles . 4 5 Process control . 5 5.1 General . 5 5.2 Printing to intended gamut 5 5.3 Determine colour characterization . 6 5.4 Maint
10、ain running characteristics of the printing device 6 5.4.1 Tools and procedures . 6 5.4.2 Tolerances 7 5.5 Job content specific adjustments . 7 Annex A (normative) Correction of colorimetric data for variation in substrate colour 8 Annex B (informative) Tolerancing schema .10 Annex C (informative) P
11、r oc ess independent w or kflo w .14 Bibliography .15 ISO 2015 All rights reserved iii Contents PagePD ISO/PAS 15339-1:2015ISO/PAS 15339-1:2015(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of
12、 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
13、, 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. The procedures used to develop this document and those intended for its further maintenance are described in the IS
14、O/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibil
15、ity 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. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of pa
16、tent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as in
17、formation about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information The committee responsible for this document is ISO/TC 130, Graphic technology. ISO/PAS 15339 consists of the following parts, under the general ti
18、tle Graphic technology Printing from digital data across multiple technologies: Part 1: Principles Publicly Available Specification Part 2: Characterized reference printing conditions, CRPC1CRPC7 Publicly Available Specificationiv ISO 2015 All rights reservedPD ISO/PAS 15339-1:2015ISO/PAS 15339-1:20
19、15(E) Introduction ISO/PAS 15339 is based on the premise that in the printing and publishing industries, electronic data are the intermediary for content storage and exchange throughout production including copy preparation, job assembly, proofing, and process colour printing. It further assumes tha
20、t data preparation can be largely process independent and that choice of the printing process or processes to be used for final production will be based primarily on run length requirements and substrates to be used. There are various tools in place to both define the relationship of digital data to
21、 printed colour for specific instances of printing and to manipulate data such that similar results can be obtained between and among different printing processes (ISO/TS 10128). These specific instances of printing are typically described by colour characterization data, which is the relationship b
22、etween CMYK input data and colour measured on the printed sheet. Where such a set of colour characterization data are used as a reference, it is referred to as a characterized reference printing condition (CRPC). When producing printed colour reproductions it is important that the organizations resp
23、onsible for material preparation, colour separation, proofing, and printing all working to a common set of parameters that uniquely define the intended visual characteristics of the final printed product. Such an agreement enables the correct production of suitable input data and subsequent producti
24、on of proofs from these data. The purpose of a proof is to simulate the visual characteristics of the finished print product as closely as possible prior to production printing. There is a unique relationship between ink, substrate, and printing process that limits the maximum chroma of the solids o
25、f the printing colorants and therefore limits the range of colours (colour gamut) that can be achieved for particular combinations. While special inks can be used, the commonly available ink pigments are used across all traditional ink processes. While toner and ink-jet systems have different colora
26、nt constraints than traditional ink processes, they tend to mimic traditional ink process aims and they will be treated as a variation of traditional ink processes. The achievable chroma range (gamuts) of ink-on-paper characterized reference printing conditions can generally be bracketed between col
27、d-set printing on newsprint on the small end and by printing on gloss coated stocks (by a variety of processes) on the large end. Between these limits there is significant overlap of process/substrate combinations. The number of intermediate characterized reference printing conditions that are logic
28、al to define between smallest and largest is in part a function of the tolerances to which printing is expected to conform to the intended characterized reference printing condition. However, the intermediate characterized reference printing conditions also need to represent common widely used print
29、ing and that was the determining factor for the selection of the characterized reference printing conditions listed in ISO/PAS 15339-2. In addition, a characterized reference printing condition 7 is included to represent a possible exchange space for large gamut processes that exceed the colour gamu
30、t of characterized reference printing condition 6 and therefore need a larger reference gamut. The data sets defined in ISO/PAS 15339-2 are those associated with the initial publication of ISO 15339. It is the intent of ISO/TC 130 that if changes in, or additions to, these data sets are needed in th
31、e future they will be documented in added parts of ISO/PAS 15339 so that changes in the data sets, or addition of data sets, are possible without losing traceability to earlier data sets. A colour characterization data set is required for each characterized reference printing condition specified. Be
32、cause the intent of ISO/PAS 15339 is that the data sets provided can be used as the reference for any printing process, they might not be aligned with the typical TVI and trapping associated with any specific printing process. The values selected need to represent a compromise between all potential
33、processes to be used in effect virtual printing on a virtual printing system. It is important to realize that digital data can be encoded as already separated CMYK or can consist of un-separated data (typically in an RGB colour space) with supplementary information (ICC colour profiles, etc.) defini
34、ng the colour intended on the printed sheet. Such unseparated data plus the associated supplementary data are sometimes referred to as “virtual CMYK” data. All data are to be encoded according to one of the PDF/X specifications (ISO 15930- series) to allow the necessary metadata which identifies the
35、 intended characterized reference printing condition to be included. The colour of the printing substrate is a critical component of the colour appearance of a printed image (it behaves like a 5th colour). With the current widespread use of optical brightening agents (OBA) ISO 2015 All rights reserv
36、ed vPD ISO/PAS 15339-1:2015ISO/PAS 15339-1:2015(E) substrate colour is defined in terms of its apparent reflectance under D50 illumination (see ISO 3664). For halftone images the colour of the substrate contributes mostly in the area not covered by ink. ISO 13655 provides a reasonably effective meth
37、od to adjust tristimulus data of measured halftone areas for moderate changes in substrate colour. ISO/PAS 15339 is based on the assumption that the colour characterization data can be adjusted (fine-tuned) for the range of normal substrate colours expected and that different characterized reference
38、 printing conditions are not required for moderate differences in substrate colour. Although density, tone value increase, grey balance, etc. are individually important tools for the printing and publishing industry, in ISO/PAS 15339 they are assumed to be part of process control and not printing de
39、finition. They need to be considered in developing reference colour characterization data sets and need to be used where applicable as part of local site ongoing process control. Modern characterization data and profile evaluation tools allow identification of the colour of the solids, the colour an
40、d tone values of the single colour scales, and the CMY values associated with the neutral (achromatic) tone scale. Using the values derived from the colour characterization data, rather than any a priori values, is the recommended input for process control aims used to control a printing process int
41、ended to conform to a particular characterized reference printing condition. Annex C provides a description of the process independent workflow that is the basis for the concepts embodied in ISO/PAS 15339.vi ISO 2015 All rights reservedPD ISO/PAS 15339-1:2015PUBLICLY AVAILABLE SPECIFICATION ISO/PAS
42、15339-1:2015(E) Graphic technology Printing from digital data across multiple technologies Part 1: Principles 1 Scope This part of ISO/PAS 15339 establishes principles for the use of colour characterization data as the definition of the intended relationship between input data and printed colour for
43、 copy preparation, job assembly, proofing, and graphic arts production printing. Additional parts of ISO/PAS 15339 specify a limited number of characterized reference printing conditions that span the expected range of colour gamuts used for the production of printed material from digital data, rega
44、rdless of printing process used. The procedure to be used to adjust colour characterization data for the normally expected range of substrate colour is specified. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable fo
45、r its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO/TS 10128, Graphic technology Methods of adjustment of the colour reproduction of a printing system to match a set of
46、characterization data ISO 12642-2, Graphic technology Input data for characterization of 4-colour process printing Part 2: Expanded data set ISO 13655, Graphic technology Spectral measurement and colorimetric computation for graphic arts images ISO 15076-1, Image technology colour management Archite
47、cture, profile format and data structure Part 1: Based on ICC.1:2010 ISO 15930 (all parts), Graphic technology Prepress digital data exchange using PDF 3 T erms a nd definiti ons For the purposes of this document, the following terms and definitions apply 3.1 colour characterization data tabulation
48、of data that represents the relationship between device code values (e.g. CMYK) and the colour (CIELAB) produced on the printed sheet by those values in a specific printing process 3.2 c olou r pr o f i le set of transforms, encoded according the rules of ISO 15076-1, that convert data between (to a
49、nd from) device space and profile connection space Note 1 to entry: The transforms contained within a colour profile can include manipulation of gamut compression/expansion, tone reproduction, colour separation, black printer creation, printing limitations (e.g. total area coverage), etc. ISO 2015 All rights reserved 1PD ISO/PAS 15339-1:2015ISO/PAS 15339-1:2015(E) 3.3 gamut region of CIELAB colour space containing all printable colours Note 1 to entry: For comparison purposes the CIELAB values of the primaries and
