ISO INTERNATIONAL STANDARD 4312 Second edition 1989-09-01 Avs Interrat Doc Sec Surface active agents -- Evaluation of certain effects of laundering - Methods of analysis and test for unsoiled cotton control cloth Agents de surface - Controle de certains effets de blanchissage - Methodes d'analyse et d'essai d'un tissu de coton témoin non souill Reference number ISO 4312 : 1989 (E) e with ISO No reproduction or networking permited without license from IHS Not for Resale ISO 4312 : 1989 (E) Contents page Foreword iv Introduction 1Scope 2 Normative references 3 Selection of specimens and samples from test pieces . Determination of intrinsic greying (greying measured in the absence of ultravioletradiation) 5 Determination of intrinsic yellowing (yellowing measured in the absence of ultraviolet radiation).. 6 Determination of increase in organic deposit content . 7 Determination of increase in incineration residue (ash) 7 8 Determination of overall decrease in breaking strength (total wear) . 8 9 Determination of decrease in breaking strength resulting from chemical degradation of cellulose due to laundering (chemical wear) . 9 10 Determination of decrease in breaking strength resulting from mechanical factors in laundering (mechanical wear) . 14 11Testreport 14 Annexes A Determination of increase (or decrease) in degree of whiteness . 16 Determination of chemical wear based on variation in average degree of viscometric polymerization in an ammonium copperll) hydroxide solution 18 ISO1989 All 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 Intermatic onal Organization for Standardizatior No reproduction or networking permitted without license from IHS Not for Resale ISO4312 : 1989 (E) C of viscometric polymerization in a copper(!) di(ethylenediamine) 21 D Grey scale and measurement of reflection 26 Figures Viscometer 12 Supporting tube for viscometer 12 B.1 Mean degree of viscometric polymerization as a function of fluidity value . . . 20 C.1 Examplesofvesselsfordissolutionof cellulose. 24 C.2 Curve showing the variation in the viscosity ratio increment of cellulose solutions in Cuen solution as a function of the product of the limiting viscositynumberandthe celluloseconcentration inthe solutions.. 25 Provided by IHS under license with ISO No reproduction or networking pemmited without license from IHS Not for Resale