ISO INTERNATIONAL STANDARD 23900-3 First edition 2015-05-01 Pigments and extenders Methods dispersibility in plastics Part 3: Determination of colouristic properties and ease of dispersion of black and colour pigments in polyethylene by two-roll milling Pigments et matieres de charge - Méthodes de dispersion et évaluation de I'aptitude a la dispersion dans les plastiques - Partie 3: Deétermination des propriétés colorimetriques et de la facilité de dispersion des pigments noirs et colorés dans le polyethylene par calandrage sur bicylindre Reference number IS0 23900-3:2015(E) ISO International Organization for Standardization @ IS0 2015 ed without license from IHS IS0 23900-3:2015(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2015 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. ISOcopyrightoffice 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 Drganizationfor Standardization Not for Resale, 2015/6/29 09:31:04 networking permited withoutlicense from IHS IS0 23900-3:2015(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references 3 Terms and definitions 4 Principle .2 5 Materials .2 5.1 Materials for method A .2 5.1.1 Test medium .2 5.1.2 Titanium dioxide pigment .2 5.2 Materials for method B .2 5.2.1 Test medium 2 5.2.2 Titanium dioxide pigment 2 6 Apparatus .2 7 Sampling. 8 Procedure .3 8.1 Testing of colouristic properties in white reduction .3 8.1.1 Preparation of the mixtures .3 8.1.2 Two-roll milling 3 8.1.3 Pressing .4 8.1.4 Photometric measurement .4 8.2 Testing of ease of dispersion. .4 8.2.1 Preparation of the test samples ..4 8.2.2 Pressing and photometric measurement .4 9 Evaluation. ..4 10 Test report ..5 11 Precision 5 Bibliography 6 ii icensee=Zhejiang Institute of Standardization 5956617 ithout license from IHS