ISO INTERNATIONAL STANDARD 2647 Second edition 2020-07 Wool Determination of percentage of medullated fibres by the projection microscope Laine - Détermination du pourcentage de fibres medulleuses au microscopeaprojection Reference number IS0 2647:2020(E) ISO @ISO 2020 IS0 2647:2020(E) COPYRIGHTPROTECTEDDOCUMENT @IS02020 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 below or Iso's memberbody in the country ofthe requester. ISO copyright office CP 40i : Ch.de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22.749 01 11 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2020 - All rights reserved IS0 2647:2020(E) Contents Page Foreword ..iv 1 Scope ..1 2 Normativereferences 3 Termsand definitions 4 Principle 5 Apparatus. 6 Atmosphere for conditioning and testing .2 ..2 7 Preparationoftestspecimens. 8 Procedure. ..2 9 Calculation and expression of results ..3 10 Testreport ..3 Annex A (informative) Appearance images oftypical fibres .4 Bibliography .6 @ IS0 2020 - All rights reserved ili