ISO INTERNATIONAL STANDARD 7668 Fourth edition 2021-08 Anodizing of aluminium and its alloys Measurement of specular reflectance and specular gloss of anodic oxidation coatings at angles of 20,45°60°0r85° Anodisation de I'aluminium et de ses alliages - Mesurage des caracteristiques de réflectivité et de brillant spéculaires des couches anodiques a angle fixe de 20, 45 60°ou 85° Reference number ISO 7668:2021(E) ISO IS02021 IS0 7668:2021(E) COPYRIGHT PROTECTED DOCUMENT @ iS0 2021 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 0111 Email: [email protected] Website: www.iso.org Published in Switzerland i @ IS0 2021 - All rights reserved