ISO INTERNATIONAL STANDARD 6388 Second edition 1989-11-15 ANsi Internar Doc Seci Surface active agents Determination of flow properties using a rotational viscometer Agents de surface - Determination des proprietés d'écoulement au moyen d'un viscosimetre rotatif Reference number ISO 6388 :1989 (E) n for Standardizatior No reproduction or networking permited without license from IHS Provided by IHS und Not for Resale ISO6388:1989(E) Foreword iSO(the International OrganizationforStandardization) is aworidwide 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 committee has been established has the right to be represented on that committee. International organizations, govern- mental 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 electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by theIsoCouncil.TheyareapprovedinaccordancewithIsOproceduresrequiringat least 75 % approval by the member bodies voting. International Standard ISO 6388 was prepared by Technical Committee ISO/TC 91, Surface active agents. This second edition cancels and replaces the first edition (IS0 6388 : 1983), of which it constitutes a minor revision. Annex A of this International Standard is for information only. ? ISO 1989 Alf rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher International Organization for Standardization Case postale 56 . CH-1211 Geneve 20 . Switzerland Printed in Switzerland Copyright International Organization for Standardization No reprodu d without license from IHS Not for Resale ISO6388 :1989 (E) Introduction The rheological behaviour of surface active agents in general is determined using a rotational viscometer, which is suitable for studying substances having a complex rheological behaviour, e.g. plastics, paints. In developing this International Standard, reference has been made to so 3219, which deals with plastics, for the definitions and the apparatus. The method specified in this International Standard, however, is specific to surface active agents. Copyright Intemational Organization for Standardization Provided by IHS underlicense with ISd Noreproductionornetworking permitedwithoutlicense from IHS Not for Resale