ISO INTERNATIONAL STANDARD 21683 First edition 2019-02 Pigments and extenders Determination of experimentally simulated nano-object release from paints, varnishes and pigmented plastics Pigments et matieres de charge - Détermination de la liberation simulee de nanoobjets presents dans des peintures, des vernis et des plastiques pigmentés Reference number IS0 21683:2019(E) ISO IS02019 IS0 21683:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ ISO 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: +4122 749 0111 Fax: +41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved IS0 21683:2019(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions 3.1 General terms and definitions .1 3.2 Specific terms and definitions 4 Symbols and abbreviated terms .4 5 Methods of stress. .5 5.1 Test specimens requirements .5 5.2 Test apparatus requirements .5 5.2.1 General. .5 5.2.2 Stress processes- Process parameters and characteristics .6 6 Measuring methods .6 6.1 Measurands 6 6.2 Aerosol measuring methods .7 6.3 Test preparation .8 6.3.1 General .8 6.3.2 Aerosol background .8 6.3.3 Aerosol sampling line .8 6.3.4 Aerosol conditioning .9 7 Procedure. ..9 8 Calculation ..10 9 Test report ..11 Annex A (informative) Examples of parameter specification of stress application methods ..13 Annex B (informative) Selected aerosol measuring equipment. ..16 Bibliography ..19 @ IS0 2019 - All rights reserved iii