ISO/TS TECHNICAL SPECIFICATION 21256-4 First edition 2023-05 Fine bubble technology Cleaning applications - Part 4: Test method for oil removal from polyester-based textile Technologie des fines bulles Applications de nettoyage Partie 4: Méthode d'essai pour I'elimination de I'huile sur un tissu en polyester Reference number ISO/TS 21256-4:2023(E) ISO @ ISO 2023 IS0/TS 21256-4:2023(E) COPYRIGHTPROTECTED DOCUMENT @IS02023 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 or ISoO's member body in the country of the requester. ISO copyright office CP 40i : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email:[email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2023- All rights reserved