ISO INTERNATIONAL STANDARD 21046 First edition 2018-11 Silk - Test method for determining the size of silk yarns Soie - Méthode d'essai pour déterminer le titre des fils de soie Reference number IS0 21046:2018(E) osi @IS02018 IS0 21046:2018(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2018 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 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 CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2018 - All rights reserved IS0 21046:2018(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions 4 Principle ..2 5 Apparatus ..2 6 Atmosphere for conditioning and testing 7 Procedure .3 7.1 Sampling. .3 7.1.1 Sample length .3 7.1.2 Sample quantity .3 7.2 Preparation 3 7.3 Weighing.. 3 7.4 Data control .4 7.5 Conditioned size 4 8 Calculations. .4 8.1 General. .4 8.2 Average size .5 8.3 Size deviation .5 8.4 Maximum size deviation 5 8.5 Conditioned size, ..5 8.6 CVsize 9 Test report ..6 Annex A (informative) Determination of drying time .1 Annex B (informative) Tolerance between conditioned size and average size ..8 Annex C (informative) Example of size test results for silk yarn .9 Bibliography .11 @ IS0 2018 - All rights reserved ii