ISO INTERNATIONAL STANDARD 15715 First edition 2003-03-01 Binders for paints and varnishes Determination of turbidity Liants pour peintures et vernis Détermination de la turbidite Reference number A ISO 15715:2003(E) ISO @ ISO 2003 ISO15715:2003(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The Iso Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In ? ISO2003 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either isO at the address below or IsO's member body in the country of the requester. ISO copyright office Case postale 56 . CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO 2003 - All rights reserved ISO 15715:2003(E) Contents Page Foreword 1 Scope 2 Termsanddefinitions 3 Principle 4 Apparatus 5 Calibration. 6 Procedure. Expression of results < 8 Precision. 3 9 Test report.. Annex A (normative) Preparation of formazine standards Annex B (informative) Use of additional measurement angles Bibliography. ationrightsreserved ii IS0 15715:2003(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through IsO technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnical committeehasbeen International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEc Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 15715 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 10, Test methods for binders for paints and varnishes. @ ISO 2003 - All rights reserved ISO 15715:2003(E) INTERNATIONAL STANDARD Binders for paints and varnishes - Determination of turbidity 1 Scope The measurement of the turbidity of liquids can be carried out visually or by instrument, but visual methods can be subjective. This method measures instrumentally the scattering of light by the insoluble matter in a liquid and therefore gives an objective determination of turbidity. Turbidity in liquids is caused by the presence of undissolved matter (i.e. non-settling flocculation, gels or other suspendedmattersuchasparticlesordroplets).Inthecaseoffinelydispersedundissolvedmatter,the turbidity may be determined by measuring the intensity of the light which is scattered by the particles when a beam of light is passed through the liquid. ThisInternational Standard specifiesaninstrumentalmethodfordeterminingtheturbidityofclearliquids.Itis applicable to resins and resin sol