ISO INTERNATIONAL STANDARD 12647-2 Third edition 2013-12-15 Graphic technology Process control for the production of half- tone colour separations, proof and production prints - Part 2: Offset lithographic processes Technologie graphique - Maitrise des procédés pour la fabrication des separations de couleur en ton trame, des épreuves et des tirages en production - Partie 2: Procédés lithographiques offset Reference number IS0 12647-2:2013(E) ISO @IS02013 ed without license from IHS Not for Resale IS0 12647-2:2013(E) COPYRIGHTPROTECTEDDOCUMENT @IS02013 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 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 or networking permited without license from IHS Not for Resale IS0 12647-2:2013(E) Contents Page Foreword ..iv Introduction. 1 Scope. 2 Normative references 3 Terms and definitions ..2 4 Requirements ..2 4.1 General. .2 4.2 Data files and printing formes 4.3 Proof or production print .4 5 Measurement methods .18 5.1 Computation of densities, CIELAB colour coordinates and CIELAB colour differences.... 18 5.2 Controlstrip ..18 Annex A (informative) Grey reproduction and grey balance ..19 Annex B (informative) Handling differences in paper colour. .23 Bibliography .25 Copyritnteatinal rganiason t? Sanarizal rights reserved iii se with ISt without license from IHS Not for Resale