ISO INTERNATIONAL STANDARD 137 Secondedition 2015-12-01 Wool Determination of fibre diameter Projection microscope method Laine-Deétermination dudiametredes fibres-Methodedu microscopeaprojection Reference number ISO137:2015(E) ISO Intermational Organization for Standardization @IS02015 =ZHEJIANG INST OF STANDARDIZATION C15956617 No reproduction or itted without license from IHS IS0 137:2015(E) COPYRIGHTPROTECTEDDOCUMENT IS02015,Published inSwitzerland 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 Ch. de Blandonnet 8. CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +4122 749 09 47 [email protected] www.iso.org Intemationaibr PrganizationforStandardization Uicensee-ZHEJIANG INSTOF STANDARDIZAoISQJ,5-All rights reserved etworking permitted without license from IHS NotforResale, 2016/3/29 05:18:56 IS0137:2015(E) Contents Page Foreword ..iv 1 Scope 2 Normative references 3 Terms and definitions 4 Principle 5 .2 Apparatus 6 Samplingandpreparation ofthetest specimens .5 6.1 Rawwool. 5 6.2 Slivers, rovings and yarns 5 6.3 Cutting of snippets. 5 6.3.1 Using a fibre holder and pusher. .5 6.3.2 Using a microtome. 5 6.4 Mounting oftest specimen. .5 7 Testprocedure .6 7.1 General. .6 7.2 Examination ofthetestspecimen .6 7.3 Focusing 7 7.4 Measuring the width of a fibre image .7 7.5 Recording of measurements... ..8 8 Measurementprocedure ..8 9 Calculationand expressionofresults ..8 10 Testreport .9 AnnexA (informative)Exampleofcalculation ..10 AnnexB(informative)Accuracyofresultsandconfidencelimitsformean ..12 Bibliography .13 iii see=ZHEJIANG INST OF STANDARDIZATION C15956617 thout license from IHS