ISO INTERNATIONAL STANDARD 20739 First edition 2019-04 Martial arts Wushu Taiji clothing Reguirements and test methods Arts martiaux - Tenues de tai-chi-chuan - Exigences et méthodes d'essai Reference number IS0 20739:2019(E) osi @IS02019 IS0 20739:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2019 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 2019 - All rights reserved IS0 20739:2019(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. 2 Normative references 3 Terms and definitions 4 Classifications. 5 Requirements ..6 5.1 Fabric selection. .6 5.2 Patterns and designs ..6 5.3 Measurements and sizes. .6 5.4 Properties. 5.5 Aspect.. ..8 5.6 Change in colour 5.7 Defects in aspect .9 5.8 Stitch density of sewing .9 6 Test methods. .10 6.1 Measurements and sizes. ..10 6.2 Properties. .10 6.2.1 Dimensional stability to washing ..10 6.2.2 Formaldehyde content. .10 6.2.3 pH value .11 6.2.4 Decomposable aromatic amine dyes .11 6.2.5 Colour fastness to water.. 6.2.6 Colour fastness to washing with soap ..11 6.2.7 Colour fastness to perspiration 11 6.2.8 Crease resistance .11 6.2.9 Tear strength .11 6.2.10 Seam strength of the back rise. ..11 6.3 Aspect. .11 6.3.1 General. .11 6.3.2 Change in colour 11 6.3.3 Sewing. .11 Bibliography ..12 @ IS0 2019 - All rights reserved iii