ISO INTERNATIONAL STANDARD 12647-3 Third edition 2013-12-15 Graphic technology Process control for the production of half- tone colour separations, proofs and production prints - Part 3: Coldset offset lithography on newsprint Technologie graphique - Controle du processus de confection de sélections couleurs tramées, d'épreuves et de tirages Partie 3: Impression offset sans sécheur sur papier journal Reference number IS0 12647-3:2013(E) ISO Copyright International Organization for Standardization @ IS0 2013 I without license from IHS Not for Resale IS0 12647-3:2013(E) COPYRIGHT PROTECTED DOCUMENT @IS02013 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax +41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ IS0 2013 - All rights reserved No reproduction Not for Resale IS0 12647-3:2013(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions ..2 4 Requirements .2 4.1 General .2 4.2 Data files and printing forms .2 4.3 Proof or production print .4 5 Test methods. .12 5.1 Computation of CIELAB colour coordinates and CIELAB colour differences ..12 5.2 Control strip ..12 Annex A (informative) Densities of ink set colours. ..13 Annex B (informative) Grey reproduction and grey balance ..14 Annex C (informative) Process control targets ..17 Annex D (informative) Flexographic newspaper printing ..18 Annex E (informative) Additional printing conditions ..19 Annex F (informative) Handling differences in paper colour ..22 Bibliography ..23 ii thout license from IHS Not for Resale