ISO INTERNATIONAL STANDARD 5267-1 Second edition 1999-03-01 Pulps Determination of drainability - Part 1: Schopper-Riegler method Pates - Détermination de I'égouttabilité - Partie 1: Méthode Schopper-Riegler [So Reference number ISO 5267-1:1999(E) ISO 5267-1:1999(E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO memberbodies).The workof preparingInternational Standardsisnormallycarried outthroughISOtechnica committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with IsO, also take part in the work. IsO collaborates closely with the International Electrotechnica Commission (IEC) on all matters of electrotechnical standardization. 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. Subcommittee SC 5, Test methods and quality specifications for pulp. This second edition cancels and replaces the first edition (IsO 5267-1: 1979), of which it constitutes a minor revision. The main amendment is the addition of iSO 14487 to clause 6 (formerly clause 7) to specify the water used in the test. IsO 5267 consists of the following parts, under the general title Pulps Determination of drainability: Part 1: Schopper-Riegler method Part 2:“Canadian Standard" freeness method Annexes A and B form an integral part of this part of ISO 5267. @ISO1999 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 the publisher. International OrganizationforStandardizatior Casepostale56·CH-1211Geneve20·Switzerland Internet iso@iso.ch Printed in Switzerland INTERNATIONAL STANDARD @ISO ISO 5267-1:1999(E) Pulps Determination of drainability Part 1: Schopper-Riegler method 1 Scope This part of IsO 5267 specifies a method for the determination of the drainability of a pulp suspension in water in terms of the Schopper-Riegler (SR) number. The Schopper-Riegler test is designed to provide a measure of the rate at which a dilute suspension of pulp may be screen.Forthisreason,thetestis notrecommendedforsomeextremelyshort-fibredpulps,suchasthosefrom the SR number. The most reliable results are obtained within the range of 10 to 90 SR number. The results of this test do not necessarily correlate with the drainage behaviour of a pulp material on a commercial paper machine. NOTE A method for the determination of drainability in terms of the "Canadian Standard" freeness number is specified in IsO 5267-2:1980, Pulps - Determination of drainability - Part 2: "Canadian Standard" freeness method. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of IsO 5267. At the time of publication, the editions indicated were valid. All standards are subject to revision, and International Standards. ISO4119:1995,Pulps—Determinationof stockconcentration. IsO 14487:1997, Pulps Standard water for physical testing. 3 Definition For the purposes of this part of ISO 5267, the following definition applies. 3.1 Schopper-Riegler number scale scale on which a discharge of 1 oo0 ml corresponds to a SR number of zero and zero discharge to a SR number of 100 3.2 stock aqueous suspension of disintegrated pulp