ISO INTERNATIONAL STANDARD 3251 Fifth edition 2019-05 Paints, varnishes and plastics - Determination of non-volatile-matter content Peintures, vernis et plastigues - Détermination de la matiere non volatile Reference number ISO 3251:2019(E) [so @IS02019 IS0 3251:2019(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 i @ IS0 2019 - All rights reserved IS0 3251:2019(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions 4 Apparatus. ..1 5 Sampling. ..2 6 Procedure ..3 6.1 Number of determinations .3 6.2 Preparation and weighing of dish .3 6.3 Weighing of samples 3 6.4 Heating. ..3 6.5 Weighing after heating .4 7 Supplementary test conditions .4 8 Expression of results .4 9 Precision ..4 9.1 Repeatability limit r ..4 9.2 Reproducibility limit R ..5 10 Test report ..5 Annex A (informative) Common test parameters .6 Bibliography .8 @ IS0 2019 - All rights reserved iii