BS ISO BRITISHSTANDARD 5269-3:2008 Pulps Preparation of laboratory sheets for physical testing - Part 3: Conventional and Rapid-Kothen sheet formers using a closed water system ICS 85.040 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards BSISO5269-3:2008 National foreword This British Standard is the UK implementation of ISO 5269-3:2008 The UK participation in its preparation was entrusted to Technical Committee PAI/11, Methods of test for paper, board andpulps. Alist of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was Amendments/corrigendaissuedsincepublication published under the authority of the Standards Policy and Date Comments Strategy Committee on 31October 2008 BSI 2008 ISBN 9780580584428 BS IS0 5269-3:2008 ISO INTERNATIONAL STANDARD 5269-3 First edition 2008-05-15 Pulps Preparation of laboratory sheets for physical testing - Part 3: Conventional and Rapid-Kothen sheet formers using a closed water system Pates-Preparationdesfeuillesdelaboratoirepouressais physiques Partie 3: Formettes conventionnelle et Rapid-Kothen, a circuit d'eau ferme Reference number ISO 5269-3:2008(E) ISO ii BSIS05269-3:2008 Contents Page Foreword iv Introduction 1 Scope 2 Normative references.. 3 Principle. 4 Apparatus 5 Preparation of sample. 5.1 Disintegration.. 5.2 Dilution....... 6 Procedurefortheconventionalsheetformer.. 6.1 Preparation of whitewaterinretention equilibrium 6.2 Preparation of laboratory sheets for physical testing ... 7 ProcedurefortheRapid-Kothensheetformer 7.1 Preparation of white water in retention equilibrium. 7.2 Preparation of laboratory sheets forphysical testing.. 8 Testreport 4 Annex A (informative) Differences between conventional and Rapid-Kothen sheet preparation.. Bibliography. ili BSISO5269-3:2008 Foreword ISsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technical committees. Each member body interested in a subject for which a technical committee has been InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 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. rights. IsO shall not be held responsible for identifying any or all such patent rights. Testmethodsandqualityspecificationsforpulps. Iso 5269 consists of the following parts, under the general title Pulps -Preparation of laboratory sheets for physicaltesting: — Part 1:Conventional sheet-formermethod Part2:Rapid-Kothenmethod Part3:ConventionalandRapid-Kothensheetformersusingaclosedwatersystem iv BSIS05269-3:2008 Introduction system; one based on the conventional sheet former and the other on the Rapid-Kothen sheet former. Since the two procedures are based on different principles for forming and drying of the sheets, the results from testing of laboratory sheets prepared using the conventional sheet former and the Rapid-Kothen sheet former order to assess the relevant properties of the pulp itself. ThispartofISO5269isintendedforusewhenpreparinglaboratorysheetsfrompulpswithahighfines representative sheets (see [5] in the Bibliography)