ISO INTERNATIONAL STANDARD 2884-1 First edition 1999-10-01 Paints and varnishes Determination of viscosity using rotary viscometers Part 1: Cone-and-plate viscometer operated at a high rate of shear Peintures et vernisDeétermination de la viscosite au moyen de viscosimetres rotatifs- Partie 1: Viscosimetre a cone et plateau a gradient de vitesse éleve ISO Reference number ISO 2884-1:1999(E) Not for Resale ISO 2884-1:1999(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO liaison with IsO, also take part in the work. isO collaborates closely with the 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 3 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. International Standard ISO 2884-1 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes. Together with the other parts (see below), this part of ISO 2884 cancels and replaces IsO 2884:1974, which has been technically revised. The main changes are: a)only a cone-and-plate viscometer is now specified; b) the shear rate is within a narrower range. ISO 2884 consists of the following parts, under the general title Paints and varnishes Determination of viscosity usingrotaryviscometers: Part 1: Cone-and-plate viscometer operated at a high rate of shear -Part 2: Disc or ball viscometer operated at a single specified speed Part 3: Disc and spindle viscometer operated at different speeds Part 4: Paddle viscometer operated at a single specified speed Annex A of this part of iSO 2884 is for information only @ISO1999 Allrights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic ormechanical,includingphotocopyingandmicrotilm,withoutpermissioninwritingfromthepublisher nternational Organizationfor Standardization Case postale 56 . CH-1211 Geneve 20 · Switzerland nternet iso@iso.ch Printed in Switzerland ional Organization for Standardizatior INTERNATIONAL STANDARD @ ISO ISO 2884-1:1999(E) Paints and varnishes - Determination of viscosity using rotary viscometers - Part 1: Cone-and-plate viscometer operated at a high rate of shear 1 Scope This part of IsO 2884 is one of a series dealing with the sampling and testing of paints, varnishes and related products. It supplements IsO 2431:1993, Paints and varnishes - Determination of flow time by use of flow cups. It specifies the general procedure to be followed in determining the dynamic viscosity of paints, varnishes and related products at a rate of shear between 9000 s-1 and 12000 s-1. The value obtained gives information about the resistance offered by the material to brushing, spraying and roller coating during application. The method specified in this part of IsO 2884 is suitable for all paints and varnishes whether they are Newtonian in behaviour or not. Materials containing dispersions of large particles will produce spurious results. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of isO 2884. For dated references, subsequent amendments to, or revisions of, any of these publications, possibility of applying the most recent editions of the normative documents indicated below. Members of iso and IEC maintain registers of currently valid International Standards. IsO 1513:1992, Paints and varnishes — Examination and preparation of samples for testing ISO 15528:—1), Paints and varnishes — Sampling. 3 Apparatus 3.1 Viscometer, with cone-and-plate geometry, working at a rate of shear bet