Paper and board - Determination of water absorptiveness - Cobb method (ISO 535:2014)

ISO 535:2014 specifies a method of determining the water absorptiveness of sized paper and board, including corrugated fibreboard, under standard conditions. It may not be suitable for paper of grammage less than 50 g/m2 or embossed paper. It is not suitable for porous papers such as newsprint or unsized papers such as blotting paper or other papers having a relatively high water absorptiveness for which ISO 8787 is more suitable.
This method is not intended to be used for precise evaluation of the writing properties of paper although it does give a general indication of suitability for use with aqueous inks.

Papier und Pappe - Bestimmung des Wasserabsorptionsvermögens - Cobb-Verfahren (ISO 535:2014)

Diese Internationale Norm legt ein Verfahren zur Bestimmung des Wasserabsorptionsvermögens von geleimtem Papier und Pappe einschließlich Wellpappe unter Standardbedingungen fest. Es ist möglicherweise nicht geeignet für Papier mit einer flächenbezogenen Masse von weniger als 50 g/m² oder für geprägtes Papier. Es ist ungeeignet für poröses Papier wie Zeitungsdruckpapier oder ungeleimtes Papier wie Löschpapier oder andere Papiere mit einem relativ hohen Wasserabsorptionsvermögen. Hierfür ist ISO 8787 [2] besser geeignet.
Dieses Verfahren ist nicht zur genauen Beurteilung der Schreibeigenschaften von Papieren bestimmt, obwohl es einen allgemeinen Hinweis auf die Eignung bei der Verwendung von wässrigen Tinten gibt.

Papier et carton - Détermination de l'absorption d'eau - Méthode de Cobb (ISO 535:2014)

L'ISO 535:2014 spécifie une méthode de détermination de la capacité d'absorption d'eau du papier collé et du carton, y compris du carton ondulé, dans des conditions normalisées. Elle peut ne pas convenir au papier de grammage inférieur à 50 g/m2 ou au papier gaufré. Elle n'est applicable ni aux papiers poreux tels que le papier journal, ni aux papiers non collés tels que le papier buvard ou d'autres papiers ayant une capacité d'absorption d'eau relativement élevée, l'ISO 8787 étant mieux adaptée dans ces cas.
Cette méthode n'est pas destinée à l'évaluation précise de l'aptitude du papier à l'écriture, bien qu'elle donne une indication générale de sa compatibilité avec des encres aqueuses.

Papir, karton in lepenka - Določevanje absorpcije vode - Cobbova metoda (ISO 535:2014)

Standard EN-ISO 535 navaja metodo za določanje absorpcije vode pri papirju, kartonu in lepenki, vključno z valovitim kartonom, v standardnih pogojih. Metoda morda ni primerna za papir z gramaturo, ki je nižja od 50 g/m2, ali za reliefno pretisnjen papir. Ni primerna za porozni papir, kot je časopisni ali neškrobljeni papir (npr. pivnik ali drugi papirji z relativno visoko absorpcijo vode, za katere je bolj primeren standard ISO 8787. Ta metoda ni namenjena za natančno vrednotenje pisalnih lastnosti papirja, čeprav podaja splošno navedbo glede primernosti za uporabo z vodnimi črnili.

General Information

Status
Published
Publication Date
04-Feb-2014
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
05-Feb-2014
Completion Date
05-Feb-2014

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SLOVENSKI STANDARD
SIST EN ISO 535:2014
01-maj-2014
1DGRPHãþD
SIST EN 20535:2000
3DSLUNDUWRQLQOHSHQND'RORþHYDQMHDEVRUSFLMHYRGH&REERYDPHWRGD ,62


Paper and board - Determination of water absorptiveness - Cobb method (ISO 535:2014)

Papier und Pappe - Bestimmung des Wasserabsorptionsvermögens - Cobb-Verfahren
(ISO 535:2014)
Papier et carton - Détermination de l'absorption d'eau - Méthode de Cobb (ISO
535:2014)
Ta slovenski standard je istoveten z: EN ISO 535:2014
ICS:
85.060 Papir, karton in lepenka Paper and board
SIST EN ISO 535:2014 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 535:2014
---------------------- Page: 2 ----------------------
SIST EN ISO 535:2014
EUROPEAN STANDARD
EN ISO 535
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2014
ICS 85.060 Supersedes EN 20535:1994
English Version
Paper and board - Determination of water absorptiveness - Cobb
method (ISO 535:2014)

Papier et carton - Détermination de l'absorption d'eau - Papier und Pappe - Bestimmung des

Méthode de Cobb (ISO 535:2014) Wasserabsorptionsvermögens - Cobb-Verfahren (ISO
535:2014)
This European Standard was approved by CEN on 23 December 2013.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European

Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national

standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same

status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United

Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 535:2014 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 535:2014
EN ISO 535:2014 (E)
Contents Page

Foreword ..............................................................................................................................................................3

---------------------- Page: 4 ----------------------
SIST EN ISO 535:2014
EN ISO 535:2014 (E)
Foreword

This document (EN ISO 535:2014) has been prepared by Technical Committee ISO/TC 6 “Paper, board and

pulps” in collaboration with Technical Committee CEN/TC 172 “Pulp, paper and board” the secretariat of

which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an identical

text or by endorsement, at the latest by August 2014, and conflicting national standards shall be withdrawn at

the latest by August 2014.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 20535:1994.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech

Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,

Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,

Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

Endorsement notice

The text of ISO 535:2014 has been approved by CEN as EN ISO 535:2014 without any modification.

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SIST EN ISO 535:2014
---------------------- Page: 6 ----------------------
SIST EN ISO 535:2014
INTERNATIONAL ISO
STANDARD 535
Third edition
2014-02-01
Paper and board — Determination of
water absorptiveness — Cobb method
Papier et carton — Détermination de l’absorption d’eau — Méthode
de Cobb
Reference number
ISO 535:2014(E)
ISO 2014
---------------------- Page: 7 ----------------------
SIST EN ISO 535:2014
ISO 535:2014(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2014

All rights reserved. Unless otherwise specified, 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
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 535:2014
ISO 535:2014(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 1

5 Reagents and materials ................................................................................................................................................................................. 1

6 Apparatus ..................................................................................................................................................................................................................... 2

7 Sampling ........................................................................................................................................................................................................................ 2

8 Conditioning .............................................................................................................................................................................................................. 2

9 Preparation of test pieces ........................................................................................................................................................................... 2

10 Procedure..................................................................................................................................................................................................................... 3

10.1 Mounting of the test piece ............................................................................................................................................................. 3

10.2 Exposure to water and blotting ................................................................................................................................................ 3

10.3 Times of test .............................................................................................................................................................................................. 3

10.4 Rejection of test pieces ..................................................................................................................................................................... 4

11 Expression of results ........................................................................................................................................................................................ 4

12 Test report ................................................................................................................................................................................................................... 5

Annex A (informative) Precision ............................................................................................................................................................................... 6

Bibliography ................................................................................................................................................................................................................................ 8

© ISO 2014 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 535:2014
ISO 535:2014(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 technical committees. Each member body interested in a subject for which a technical

committee has been established has 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 Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

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. Details of any

patent rights identified during the development of the document will be in the Introduction and/or on

the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers

to Trade (TBT) see the following URL: Foreword - Supplementary information

The committee responsible for this document is ISO/TC 6, Paper, board and pulps, Subcommittee SC 2,

Test methods and quality specifications for paper and board.

This third edition cancels and replaces the second edition (ISO 535:1991), which has been technically

revised to include precision data.
iv © ISO 2014 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 535:2014
ISO 535:2014(E)
Introduction

The test described in this International Standard permits the determination of the quantity of water

that can be absorbed by the surface of paper or board in a given time. Water absorptiveness is a function

of various paper and board characteristics such as sizing, porosity, etc.
© ISO 2014 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 535:2014
---------------------- Page: 12 ----------------------
SIST EN ISO 535:2014
INTERNATIONAL STANDARD ISO 535:2014(E)
Paper and board — Determination of water absorptiveness
— Cobb method
1 Scope

This International Standard specifies a method of determining the water absorptiveness of sized paper

and board, including corrugated fibreboard, under standard conditions. It may not be suitable for paper

of grammage less than 50 g/m or embossed paper. It is not suitable for porous papers such as newsprint

or unsized papers such as blotting paper or other papers having a relatively high water absorptiveness

[2]
for which ISO 8787 is more suitable.

This method is not intended to be used for precise evaluation of the writing properties of paper although

it does give a general indication of suitability for use with aqueous inks.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

ISO 186, Paper and board — Sampling to determine average quality

ISO 187, Paper, board and pulps — Standard atmosphere for conditioning and testing and procedure for

monitoring the atmosphere and conditioning of samples

ISO 5269-1, Pulps — Preparation of laboratory sheets for physical testing — Part 1: Conventional sheet-

former method
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
water absorptiveness (Cobb value)

calculated mass of water absorbed in a specified time by 1 m of paper or board under specif

...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.PHWRGDPapier und Pappe - Bestimmung des Wasserabsorptionsvermögens - Cobb-Verfahren (ISO/FDIS 535:2013)Papier et carton - Détermination de l'absorption d'eau - Méthode de Cobb (ISO/FDIS 535:2013)Paper and board - Determination of water absorptiveness - Cobb method (ISO/FDIS 535:2013)85.060Papir, karton in lepenkaPaper and boardICS:Ta slovenski standard je istoveten z:FprEN ISO 535kSIST FprEN ISO 535:2013en01-oktober-2013kSIST FprEN ISO 535:2013SLOVENSKI

STANDARD
kSIST FprEN ISO 535:2013

© ISO 2013Paper and board — Determination of water absorptiveness — Cobb methodPapier et carton — Détermination de l’absorption d’eau — Méthode de CobbINTERNATIONAL STANDARDPlease see the administrative notes on page iiiReference numberISO/FDIS 535:2013(E)ISO/FDIS535ISO/TC 6/SC 2Secretariat: SISVoting begins on: 2013-0Voting terminates on: 2013-1RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE AND TO PROVIDE SUPPOR TING DOCUMENTATION.IN ADDITION TO THEIR EVALUATION AS

BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STAN­DARDS TO WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.FINALDRAFTkSIST FprEN ISO 535:2013

ISO/FDIS 535:2013(E) ii © ISO 2013 – All rights reservedCOPYRIGHT PROTECTED DOCUMENT©

ISO 2013All rights reservedä Unless otherwise speci Ðiedá no part of this publication may be reproduced or utilized otherwise in any form or by any meansá electronic or mechanicalá including photocopyingá or posting on the internet or an intranetá without prior written permissionä Permission can be requested from either ISO at the address below or ISOïs member body in the country of the requester.ISO copyright of ÐiceTel. + 41 22 749 01 11Fax + 41 22 749 09 47Eæmail copyright 7isoäorgWeb www.iso.orgPublished in SwitzerlandkSIST FprEN ISO 535:2013

ISO/CEN PARALLEL PROCESSING­cessed under the ISO-lead mode of collaboration as de Ðined in the Vienna Agreementä The

Ðinal draft was established on the basis of comments received during a parallel enquiry on the draftäThis

Ðinal draft is hereby submitted to the ISO member bodies and to the CEN member bodies for a parallel two­month approval vote in ISO and formal vote in CEN.Positive votes shall not be accompanied by comments.Negative votes shall be accompanied by the relevant technical reasons.ISO/FDIS 535:2013(E) © ISO 2013 – All rights reserved iiikSIST FprEN ISO 535:2013

ISO/FDIS 535:2013(E) iv © ISO 2013 – All rights reservedContents PageForeword ..........................................................................................................................................................................................................................................vIntroduction ................................................................................................................................................................................................................................vi1 Scope .................................................................................................................................................................................................................................12 Normative references ......................................................................................................................................................................................1uTermsanddeÐinitions .....................................................................................................................................................................................14 Principle ........................................................................................................................................................................................................................15 Reagents and materials .................................................................................................................................................................................16 Apparatus .....................................................................................................................................................................................................................27 Sampling ........................................................................................................................................................................................................................28 Conditioning ..............................................................................................................................................................................................................29 Preparation of test pieces ...........................................................................................................................................................................210 Procedure.....................................................................................................................................................................................................................310.1 Mounting of the test piece .............................................................................................................................................................310.2 Exposure to water and blotting ................................................................................................................................................310.3 Times of test ..............................................................................................................................................................................................310.4 Rejection of test pieces .....................................................................................................................................................................411 Expression of results ........................................................................................................................................................................................412 Test report ...................................................................................................................................................................................................................5Annex A (informative) Precision ...............................................................................................................................................................................6Bibliography ................................................................................................................................................................................................................................8kSIST FprEN ISO 535:2013

ISO/FDIS 535:2013(E)Forewordthrough ISO technical committeesä Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizationsá governmental and nonægovernmentalá in liaison with ISOá also take part in the workä electrotechnical standardizationäThe procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1.

In particular the different approval criteria needed for the different types of ISO documents should be notedä

This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2.

www.iso.org/directivesAttention is drawn to the possibility that some of the elements of this document may be the subject of patent rightsä ISO shall not be held responsible for identifying any or all such patent rightsä

Details of on the ISO list of patent declarations received.

www.iso.org/patentsAny trade name used in this document is information given for the convenience of users and does not constitute an endorsement.The committee responsible for this document is ISO/TC 6, Paper, board and pulps, Subcommittee SC 2, Test methods and quality speci Ôications for paper and board.

w urevised to include precision data. © ISO 2013 – All rights reserved vkSIST FprEN ISO 535:2013

ISO/FDIS 535:2013(E)IntroductionThe test described in this International Standard permits the determination of the quantity of water that can be absorbed by the surface of paper or board in a given timeä Water absorptiveness is a function of various paper and board characteristics such as sizingá porosityá etcä vi © ISO 2013 – All rights reservedkSIST FprEN ISO 535:2013

Paper and board — Determination of water absorptiveness — Cobb method1 ScopeThis International Standard speci Ðies a method of determining the water absorptiveness of sized paper and boardá including corrugated

Ðibreboardá under standard conditionsä It may not be suitable for paper of grammage less than 50 g/m2 or embossed paper. It is not suitable for porous papers such as newsprint or unsized papers such as blotting paper or other papers having a relatively high water absorptiveness for which ISO 8787 [2] is more suitable.This method is not intended to be used for precise evaluation of the writing properties of paper although it does give a general indication of suitability for use with aqueous inksä2 Normative referencesThe following documentsá in whole or in partá are normatively referenced in this document and are indispensable for its applicationä For dated referencesá only the edition cited appliesä For undated ISO 186, Paper and board — Sampling to determine average qualityISO 187, Paperá board and pulps tandard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samplesISO 5269­1, Pulps reparation of laboratory sheets for physical testing art

wã Conventional sheetæformer methoduTermsanddeÐinitionsFor the purposes of this documentá the following terms and de Ðinitions applyä3.1water absorptiveness (Cobb value)calculated mass of water absorbed in a speci Ðied time by

s m2 of paper or board under speci Ðied conditionsNote
s to entryã The test area is normally

s r r cm2.4 PrincipleA test piece is weighed immediately before and immediately after exposure for a speci Ðied time of one surface to waterá followed by blottingä The result of the increase in mass is expressed in grams per square metre (g/m2).5 Reagents and materials5.1 Water, distilled or deionized. The temperature of the water is important and should be maintained during the test at the temperature used for conditioning and testing.5.2 Blotting paper, having a grammage of 250 g/m2 ± 25 g/m2. Pulp evaluation blotters are acceptable for the purposes of this International Standard (see ISO 5269­1).FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 535:2013(E)© ISO 2013 – All rights reserved 1kSIST FprEN ISO 535:2013

ISO/FDIS 535:2013(E)6 Apparatus6.1 Absorptiveness tester for the determination of water absorptiveness.Any type of apparatus may be used which permits— an immediate and uniform contact of the water with the part of the test piece submitted to the test;— controlled rapid removal of the unabsorbed water from the test piece at the end of the contact period; and— the rapid removal of the test piece without the risk of contact with water outside the test area.In its simplest form, the apparatus consists of a rigid base with a smooth, planar surface, and a rigid metal cylinder of

s s t
...

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