ISO INTERNATIONAL STANDARD 23900-2 Firstedition 2015-05-01 Pigments and extenders Methods of dispersion and assessment of dispersibility in plastics Part 2: Determination of colouristic properties and ease of dispersion in plasticized polyvinyl chloride by two-roll milling Pigments et matieres de charge - Méthodes de dispersion et évaluation de I'aptitude a la dispersion dans les plastiques - Partie 2: Détermination des propriétes colorimetriques et de la facilite de dispersion dans le polychlorure de vinyle plastifié par calandrage sur bicylindre Reference number ISO 23900-2:2015(E) ISO International Organization for Standardization @ IS0 2015 ithout license from IHS IS0 23900-2:2015(E) COPYRIGHT PROTECTED DOCUMENT @ISO2015 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 DrganizationforStandardization Not for Resale, 2015/6/29 09:31:36 No reproduction or networking permited without license from IHS IS0 23900-2:2015(E) Contents Page Foreword ..iv 1 Scope 2 Normative references ..1 3 Terms and definitions 4 Principle 5 Material. ..2 6 Apparatus ..2 7 Sampling: ? 8 Procedure .3 8.1 Milling at (160 ± 5) °C .3 8.1.1 Premixing of the test materials .3 8.1.2 Two-roll milling .3 8.1.3 Pressing .3 8.2 Milling at (130 ± 5) °C .4 9 Photometric measurement. .4 10 Evaluation ..4 10.1 Evaluation of colouristic properties in a white reduction ..4 10.2 Evaluation of the ease of dispersion .4 11 Test report ..4 12 Precision ..5 Annex A (informative) Description of the basic compound. ..6 Bibliography 8 iii icensee=Zhejiang Institute of Standardization 5956617 ithout license from IHS