ISO INTERNATIONAL STANDARD 22700 IULTCS/IUF474 First edition 2019-03 Leather Measuring the colour and colour difference of finished leather Cuir - Mesurage de la couleur et des écarts de couleur des cuirs finis Reference numbers ISO 22700:2019(E) IULTCS/IUF474:2019(E) @IS02019 IS0 22700:2019(E) IULTCS/IUF474:2019(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: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved IS0 22700:2019(E) IULTCS/IUF474:2019(E) Contents Page Foreword ..iv 1 Scope 1 2 Normative references ..1 3 Terms and definitions 4 Principle ..2 5 Apparatus and materials .3 6 Procedure .4 6.1 Standardization of colour measuring instrument. .4 6.2 Sampling. .4 6.3 Measuring procedure ..5 7 Method of calculation 5 7.1 General. .5 7.2 Tristimulus values. .5 7.3 CIE 1976 L*, a*, b*, C*ab and hab .6 7.4 Calculation of the CIEDE2oo0 total colour difference formula > 8 Test report .8 Annex A (informative) Background to standard procedure for measuring the colour of finished leather.. 9 Bibliography .12 @ IS0 2019 - All rights reserved ii