EN ISO 638-2:2021

SLOVENSKI STANDARD
01-september-2021
Nadomešča:
SIST EN ISO 638:2009
Papir, karton, lepenka in vlaknine ter celulozni nanomateriali - Določevanje suhe
snovi - Metoda sušenja v sušilniku - 2. del: Suspenzije celuloznih nanomaterialov
(ISO 638-2:2021)
Paper, board, pulps and cellulosic nanomaterials - Determination of dry matter content
by oven-drying method - Part 2: Suspensions of cellulosic nanomaterials (ISO 638-
2:2021)
Papier, Pappe, Faserstoff und cellulosehaltige Nanomaterialien - Bestimmung des
Trockengehaltes durch das Wärmeschrankverfahren - Teil 2: Suspensionen von
cellulosehaltigen Nanomaterialien (ISO 638-2:2021)
Papiers, cartons, pâtes et nanomatériaux cellulosiques - Détermination de la teneur en
matières sèches par séchage à l'étuve - Partie 2: Suspensions de nanomatériaux
cellulosiques (ISO 638-2:2021)
Ta slovenski standard je istoveten z: EN ISO 638-2:2021
ICS:
85.040 Vlaknine Pulps
85.060 Papir, karton in lepenka Paper and board
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 638-2
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2021
EUROPÄISCHE NORM
ICS 85.040; 85.060 Supersedes EN ISO 638:2008
English Version
Paper, board, pulps and cellulosic nanomaterials -
Determination of dry matter content by oven-drying
method - Part 2: Suspensions of cellulosic nanomaterials
(ISO 638-2:2021)
Papiers, cartons, pâtes et nanomatériaux cellulosiques Papier, Pappe, Faserstoff und cellulosehaltige
- Détermination de la teneur en matières sèches par Nanomaterialien - Bestimmung des Trockengehaltes
séchage à l'étuve - Partie 2: Suspensions de durch das Wärmeschrankverfahren - Teil 2:
nanomatériaux cellulosiques (ISO 638-2:2021) Suspensionen von cellulosehaltigen Nanomaterialien
(ISO 638-2:2021)
This European Standard was approved by CEN on 6 May 2021.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 638-2:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 638-2:2021) 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 November 2021, and conflicting national standards
shall be withdrawn at the latest by November 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 638:2008.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 638-2:2021 has been approved by CEN as EN ISO 638-2:2021 without any modification.

INTERNATIONAL ISO
STANDARD 638-2
First edition
2021-05
Paper, board, pulps and cellulosic
nanomaterials — Determination of
dry matter content by oven-drying
method —
Part 2:
Suspensions of cellulosic
nanomaterials
Papiers, cartons, pâtes et nanomatériaux cellulosiques —
Détermination de la teneur en matières sèches par séchage à
l'étuve —
Partie 2: Suspensions de nanomatériaux cellulosiques
Reference number
ISO 638-2:2021(E)
©
ISO 2021
ISO 638-2:2021(E)
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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below or ISO’s member body in the country of the requester.
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Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

ISO 638-2:2021(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 2
6 Sampling . 3
7 Preparation of test specimens . 3
8 Procedure. 3
9 Calculation and expression of results . 5
10 Precision . 5
11 Test report . 5
Annex A (informative) Calculation of the water content . 6
Annex B (informative) Precision . 7
Bibliography . 9
ISO 638-2:2021(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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 6 Paper, board and pulps.
This first edition of ISO 638-2, together with ISO 638-1, cancels and replaces ISO 638:2008, which has
been technically revised. The main changes compared to the previous edition are as follows:
— inclusion of cellulosic nanomaterials and paper and board for recycling in the scope;
— splitting of the standard in two parts;
— technical revision of the procedure;
— editorial revision of the document;
— update of precision clause.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved

ISO 638-2:2021(E)
Introduction
Determination of dry matter content and water content are carried out for different purposes.
This document is used when the dry matter content is needed to calculate the results for chemical
analysis or physical testing, or to determine the water content of cellulosic nanomaterial suspensions.
[1]
ISO 638-1 is dedicated to the determination of the dry matter content or moisture content in paper,
board, pulp and cellulosic nanomaterials in solid form, which all may be produced from virgin and/or
recycled materials.
[2]
ISO 287 is used for the purpose of determining the average moisture content and the variation in
moisture content (maximum and minimum values) of a lot of paper and board. In the converting of
paper and board, moisture content is important as it can have an effect on processes such as printing
and copying. Moisture content can have an effect on curl and dimensional stability.
[3]
ISO 4119 is used in laboratory procedures or is referred to in other International Standards in which
the stock concentration of an aqueous pulp suspension requires determination.
INTERNATIONAL STANDARD ISO 638-2:2021(E)
Paper, board, pulps and cellulosic nanomaterials —
Determination of dry matter content by oven-drying
method —
Part 2:
Suspensions of cellulosic nanomaterials
1 Scope
This document specifies an oven-drying method for the determination of the dry matter content
in suspensions of cellulosic nanomaterials. The procedure is applicable to cellulosic nanomaterial
suspensions which do not contain any appreciable quantities of materials other than
...