1、BSI Standards PublicationBS ISO 12647-5:2015Graphic technology Processcontrol for the manufacture ofhalf-tone colour separations,proof and production printsPart 5: Screen printingBS ISO 12647-5:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 12647-5:2015.I
2、t supersedes BS ISO 12647-5:2001 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PAI/43, Graphic technology.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all
3、 the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 76727 2ICS 37.100.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Stan
4、dard was published under the authority of theStandards Policy and Strategy Committee on 31 January 2015.Amendments issued since publicationDate Text affectedBS ISO 12647-5:2015 ISO 2015Graphic technology Process control for the manufacture of half-tone colour separations, proof and production prints
5、 Part 5: Screen printingTechnologie graphique Contrle du processus de confection de slections couleurs trames, dpreuves et de tirages Partie 5: SrigraphieINTERNATIONAL STANDARDISO12647-5Second edition2015-01-15Reference numberISO 12647-5:2015(E)BS ISO 12647-5:2015ISO 12647-5:2015(E)ii ISO 2015 All r
6、ights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015All 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 pr
7、ior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandB
8、S ISO 12647-5:2015ISO 12647-5:2015(E)Contents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Requirements 24.1 Data requirements for screen printing systems . 24.1.1 Data delivery . 24.1.2 Data resolution 24.2 Printing forme requirements 24.2.1 Resolutio
9、n 24.2.2 Stencil production . 34.2.3 Printing forme orientation 34.2.4 Image size tolerance . 34.3 Print production requirements 34.3.1 Visual characteristics of image components . 34.3.2 Tolerance for image positioning . 44.3.3 Image reproduction . 45 Test method and reporting: Control strip 5Annex
10、 A (informative) Process control strip example . 6Annex B (normative) Correction of colorimetric data for variation in substrate colour 7Annex C (informative) Solid patch aims for various gamut options 8Bibliography 9 ISO 2015 All rights reserved iiiBS ISO 12647-5:2015ISO 12647-5:2015(E)ForewordISO
11、(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 comm
12、ittee 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 electrote
13、chnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafte
14、d in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).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 right
15、s. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent 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 constitut
16、e an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committ
17、ee responsible for this document is ISO/TC 130, Graphic technology.This second edition cancels and replaces the first edition (ISO 12647-5:2001), which has been technically revised.ISO 12647 consists of the following parts, under the general title Graphic technology Process control for the manufactu
18、re 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: Proofin
19、g processes working directly from digital data Part 8: Validation print processes working directly from digital dataiv ISO 2015 All rights reservedBS ISO 12647-5:2015ISO 12647-5:2015(E)IntroductionHistorically, this International Standard established the process control parameters and their aim valu
20、es and tolerances for the most important professional printing processes of the graphic arts industry. The initial concept was that the groundwork for the series was laid down in ISO 12647-1. This part of the ISO 12647- series differs from that concept because screen printing has changed significant
21、ly since this International Standard was initially conceived.This edition of this part of ISO 12647 differs from the earlier edition by not defining specific printing condition aims but instead requiring that a specific reference printing condition (characterization data set) be specified. This part
22、 of ISO 12647 requires that the colour of the printed product match a characterization data set or a printing condition agreed upon by the provider and the receiver and specifies minimum requirements and tolerances to be communicated and produced. Where specific physical parameters can impact the fi
23、nal result (screen angles, resolution, screen mesh, etc.), specifications and tolerances are provided for these parameters.Because material produced by screen printing varies widely in both size and nominal viewing distance, a viewing distance metric is introduced as part of all screening and resolu
24、tion requirements. ISO 2015 All rights reserved vBS ISO 12647-5:2015BS ISO 12647-5:2015Graphic technology Process control for the manufacture of half-tone colour separations, proof and production prints Part 5: Screen printing1 ScopeThis part of ISO 12647 specifies the requirements for the screen pr
25、inting of four-colour process-colour material used for display, signage, and graphics using flat bed or cylinder printing equipment. Both the size and resolution of the finished product are unrestricted. The process stages included are data preparation and delivery, proof production, printing forme
26、preparation, and production printing.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the refe
27、renced document (including any amendments) applies.ISO 12639, Graphic technology Prepress digital data exchange Tag image file format for image technology (TIFF/IT)ISO 12647-1, Graphic technology Process control for the production of half-tone colour separations, proof and production prints Part 1:
28、Parameters and measurement methodsISO 12647-7, Graphic technology Process control for the production of half-tone colour separations, proof and production prints Part 7: Proofing processes working directly from digital dataISO 12647-8, Graphic technology Process control for the production of half-to
29、ne colour separations, proof and production prints Part 8: Validation print processes working directly from digital dataISO 13655:2009, Graphic technology Spectral measurement and colorimetric computation for graphic arts imagesISO 15930-1, Graphic technology Prepress digital data exchange Use of PD
30、F Part 1: Complete exchange using CMYK data (PDF/X-1 and PDF/X-1a)3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 12647-1 apply.INTERNATIONAL STANDARD ISO 12647-5:2015(E) ISO 2015 All rights reserved 1BS ISO 12647-5:2015ISO 12647-5:2015(E)4 Requiremen
31、ts4.1 Data requirements for screen printing systems4.1.1 Data deliveryScreen print systems shall accept digital data delivered as PDF/X data files as defined in ISO 15930-1 or TIFF/IT files as defined in ISO 12639.The intended printing condition shall be either1) a published Characterized Reference
32、Printing Condition (CRPC) as listed in the ICC registry at www.color.org, or2) a custom data set where none of the available reference colour characterization data sets are considered appropriate for the intended printing because of the inks, paper, or other factors.Where the characterization data t
33、o be used have a substrate colour (CIELAB values) that does not match the substrate to be used, the data should be adjusted using the tristimulus correction method defined in Annex B.Prior agreement as to the characterization data and substrate adjustment to be used shall be obtained between all par
34、ties involved before copy preparation work is started.Characterization data sets are the only method recognized by this part of ISO 12647 for the proper identification of the printing condition to be used. Film and/or directly exposed screens shall be generated from digital data and legacy film shou
35、ld be assumed to have been prepared to some agreed upon reference characterization.4.1.2 Data resolutionInput data should be provided at a data spacing of twice the screen ruling to be used as determined by the scaling criteria, e.g.: 140 cm1pixels for a 70 cm1screen ruling.4.2 Printing forme requir
36、ements4.2.1 ResolutionPrinted material produced by screen printing varies widely in both size and nominal viewing distance. For screen printing the reference acceptable image quality criteria shall be based on a 70 cm1screen ruling viewed at a distance of 42 cm (175 lpi at 16,5 inches). This relatio
37、nship of distance and screen ruling defines when rosettes are no longer visible to a viewer with 20/20 vision (dot fusion).This relationship should be scaled for other viewing distances or other screen rulings. For the same viewing quality at different distances, maintain the relationship of resolut
38、ion to distance.NOTE For a convenient approximation, divide either the desired distance in meters or the desired resolution in dots per centimetre into 30 to compute the other for that specific pair. This is sometimes referred to as the rule of 30.The target resolution shall be based on an agreement
39、 between the printer and their customer. It should be in accordance with the following three criteria:1) a minimum screen ruling with dots large enough to reproduce a tonal range from 1 % to 98 % using the mesh as configured, the imaging technique, the emulsion and the ink;2) a minimum printed dot s
40、ize that is not less than 1,5x the width of the thread diameter of the mesh;3) a maximum screen ruling as recommended by the “rule of 30” for the intended viewing condition.2 ISO 2015 All rights reservedBS ISO 12647-5:2015ISO 12647-5:2015(E)4.2.2 Stencil productionThe silver, thermal, or inkjet film
41、 used for imaging screens shall have sufficient UV density (4,0) in printing areas and sufficient UV transparency (0,1) in the non-printing areas to produce all dots required in 4.2.1. Direct to screen and computer to screen systems (CTS) shall have sufficient resolution be able to produce all dots
42、required in 4.2.1.NOTE Computer to screen systems (CTS) directly image the stencil and direct to screen systems (DTS) apply an image which is used to create the stencil.4.2.3 Printing forme orientation4.2.3.1 Printing forme preparationThe angle of the screen mesh attached to the screen frame shall b
43、e at 0 and 90 1 with respect to the frame. The angles of the image shall also be 0 and 90 1 with respect to the frame.4.2.3.2 Screen anglesFor half-tone dots without a principal axis, the nominal difference between the screen angles for cyan, magenta, and black shall be 30, with the screen angle of
44、yellow separated at 15 from another colour.For half-tone dots with a principal axis, the nominal difference between screen angles for cyan, magenta, and black shall be 60, with the screen angle of yellow separated by 15 from another colour.In all cases, no colour should align within 7,5 of the mesh
45、(frame). If flesh tones are present, the yellow should not be referenced to magenta.NOTE 1 This is to prevent moir in flesh tones and to ensure that no row of dots lines up with the mesh, which would destabilize the small dot structure. It is poor practice to use and rotate offset films to produce t
46、he forme.NOTE 2 It is common practice to use frequency modulated screening for the yellow separation with approximately the same size as the dots in the 10 % area of the conventional separations and a different tonal compensation curve.4.2.4 Image size toleranceFor film based systems, the set of sup
47、plied films under common environmental equilibrium shall not differ by more than 0,02 % in the lengths of their diagonals.4.3 Print production requirements4.3.1 Visual characteristics of image components4.3.1.1 Visual appearance of the supplied proofSupplied proofs shall be prepared in accordance wi
48、th either ISO 12647-7 or ISO 12647-8 except where indicated below and shall use the same characterization data set chosen for production. The tristimulus correction factor shall be used to adjust for the substrate colour when the production stock is not available. Proofs shall have the proper colour
49、 but may have a different size than the intended product. Proof resolution may be finer than the intended product. In this case the rule of 30 shall be followed within the constraints of the proofing equipment assuming the proof to be viewed at 42 cm.4.3.1.2 Print substrate colourFor the best colour reproduction, the print substrate colour should be restricted as shown in Table 1. All colour measurement shall be made in accordance with ISO 13655:2009, white backing, M1.NOTE Surface finish, if
