Paper, board, pulps and cellulosic nanomaterials - Determination of dry matter content by oven-drying method - Part 1: Materials in solid form (ISO 638-1:2021)

Papier, Pappe, Faserstoff und cellulosehaltige Nanomaterialien - Bestimmung des Trockengehaltes - Wärmeschrankverfahren - Teil 1: Materialien in fester Form (ISO 638-1:2021)

Dieses Dokument legt ein Wärmeschrankverfahren für die Bestimmung des Trockengehaltes von Papier, Pappe, Faserstoff und cellulosehaltigen Nanomaterialien in fester Form fest, die jeweils aus Neumaterial und/oder recyceltem Material hergestellt werden können.
Es ist zudem anzuwenden für die Bestimmung des Trockengehaltes von Papier und Pappe für das Recycling.
Das Verfahren ist anzuwenden für Papier, Pappe und Faserstoff sowie cellulosehaltige Nanomaterialien, die außer Wasser keine nennenswerten Mengen von Materialien enthalten, die bei einer Temperatur von 105 °C ± 2 °C flüchtig sind. Es wird z. B. im Fall von Faserstoff-, Papier- und Pappe Durchschnittsproben sowie Durchschnittsproben von cellulosehaltigen Nanomaterialien verwendet, die für chemische und physikalische Prüfungen im Laboratorium entnommen werden, wenn eine gleichzeitige Bestimmung des Trockengehaltes erforderlich ist.
Dieses Verfahren ist nicht anzuwenden für die Bestimmung des Trockengehaltes von Faserstoff Suspensionen oder für die Bestimmung der verkaufsfähigen Masse von Faserstoff Lieferposten.
ANMERKUNG 1 ISO 638 2 [1] legt ein Wärmeschrankverfahren für die Bestimmung des Trockengehaltes von Suspensionen von cellulosehaltigen Nanomaterialien fest; ISO 287 [2] legt die Bestimmung des Feuchtegehaltes in einem Lieferposten Papier oder Pappe fest; ISO 4119 [3] legt die Bestimmung der Stoffdichte von Faserstoffen fest; ISO 801 (alle Teile) [4] legt die Bestimmung der verkaufsfähigen Masse in Lieferposten fest.
ANMERKUNG 2 Dieses Dokument dient der Bestimmung des Gesamttrockengehaltes der Durchschnittsprobe einschließlich jeglicher gelöster Feststoffe. Wird nur der Gehalt an cellulosehaltigem Material ohne die gelösten Feststoffe gewünscht, werden gelöste Feststoffe vor der Messung des Trockengehaltes z. B. durch Waschen oder Dialyse entfernt, wobei darauf geachtet wird, dass das gesamte cellulosehaltige Material erhalten bleibt; in Fällen, in denen die Durchschnittsprobe ohne Verlust von cellulosehaltigen Feststoffen gefiltert werden kann, kann ISO 4119 [3] angewendet werden, um die Stoffdichte (Gehalt an cellulosehaltigem Material in fester Form) zu bestimmen.

Papiers, cartons, pâtes et nanomatériaux cellulosiques - Détermination de la teneur en matières sèches par séchage à l'étuve - Partie 1: Matériaux sous forme solide (ISO 638-1:2021)

Papir, karton, lepenka in vlaknine ter celulozni nanomateriali - Določevanje suhe snovi - Metoda sušenja v sušilniku - 1. del: Materiali v trdni obliki (ISO 638-1:2021)

General Information

Status
Published
Public Enquiry End Date
09-Oct-2020
Publication Date
29-Jun-2021
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
11-Jun-2021
Due Date
16-Aug-2021
Completion Date
30-Jun-2021

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SLOVENSKI STANDARD
SIST EN ISO 638-1:2021
01-september-2021
Nadomešča:
SIST EN ISO 638:2009

Papir, karton, lepenka in vlaknine ter celulozni nanomateriali - Določevanje suhe

snovi - Metoda sušenja v sušilniku - 1. del: Materiali v trdni obliki (ISO 638-1:2021)

Paper, board, pulps and cellulosic nanomaterials - Determination of dry matter content

by oven-drying method - Part 1: Materials in solid form (ISO 638-1:2021)
Papier, Pappe, Faserstoff und cellulosehaltige Nanomaterialien - Bestimmung des

Trockengehaltes - Wärmeschrankverfahren - Teil 1: Materialien in fester Form (ISO 638-

1:2021)

Papiers, cartons, pâtes et nanomatériaux cellulosiques - Détermination de la teneur en

matières sèches par séchage à l'étuve - Partie 1: Matériaux sous forme solide (ISO 638-

1:2021)
Ta slovenski standard je istoveten z: EN ISO 638-1:2021
ICS:
85.040 Vlaknine Pulps
85.060 Papir, karton in lepenka Paper and board
SIST EN ISO 638-1:2021 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN ISO 638-1:2021
---------------------- Page: 2 ----------------------
SIST EN ISO 638-1:2021
EN ISO 638-1
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 1: Materials in solid form (ISO 638-1:2021)

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 1: Matériaux sous forme Wärmeschrankverfahren - Teil 1: Materialien in fester

solide (ISO 638-1:2021) Form (ISO 638-1:2021)
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 638-1:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 638-1:2021
EN ISO 638-1:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

---------------------- Page: 4 ----------------------
SIST EN ISO 638-1:2021
EN ISO 638-1:2021 (E)
European foreword

This document (EN ISO 638-1:2021) 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 638-1:2021 has been approved by CEN as EN ISO 638-1:2021 without any modification.

---------------------- Page: 5 ----------------------
SIST EN ISO 638-1:2021
---------------------- Page: 6 ----------------------
SIST EN ISO 638-1:2021
INTERNATIONAL ISO
STANDARD 638-1
First edition
2021-05
Paper, board, pulps and cellulosic
nanomaterials — Determination of
dry matter content by oven-drying
method —
Part 1:
Materials in solid form
Papiers, cartons, pâtes et nanomatériaux cellulosiques —
Détermination de la teneur en matières sèches par séchage à
l'étuve —
Partie 1: Matériaux sous forme solide
Reference number
ISO 638-1:2021(E)
ISO 2021
---------------------- Page: 7 ----------------------
SIST EN ISO 638-1:2021
ISO 638-1:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 638-1:2021
ISO 638-1:2021(E)
Contents Page

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

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

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

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

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

4 Principle ........................................................................................................................................................................................................................ 2

5 Apparatus ..................................................................................................................................................................................................................... 3

6 Sampling ........................................................................................................................................................................................................................ 3

7 Preparation of test pieces ........................................................................................................................................................................... 3

7.1 General ........................................................................................................................................................................................................... 3

7.2 Paper and board for recycling .................................................................................................................................................... 3

7.3 Paper, board, pulp and cellulosic nanomaterial in solid form ........................................................................ 3

8 Procedure..................................................................................................................................................................................................................... 4

9 Calculation and expression of results ............................................................................................................................................. 5

10 Precision ....................................................................................................................................................................................................................... 5

11 Test report ................................................................................................................................................................................................................... 5

Annex A (informative) Calculation of the moisture content ........................................................................................................ 6

Annex B (informative) Precision ............................................................................................................................................................................... 7

Bibliography .............................................................................................................................................................................................................................10

© ISO 2021 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 638-1:2021
ISO 638-1:2021(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 on 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 638-1, together with ISO 638-2, 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
---------------------- Page: 10 ----------------------
SIST EN ISO 638-1:2021
ISO 638-1:2021(E)
Introduction

Determination of dry matter content and moisture 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 moisture content of paper, board, and pulp and cellulosic

nanomaterials in solid form, which all may be produced from virgin and/or recycled materials. An

example of this is where the results of a chemical analysis for cadmium or manganese are required on

the basis of the oven-dry mass of the sample.
[1]

ISO 638-2 is dedicated to the determination of the dry matter content or water content of cellulosic

nanomaterials in the form of suspensions.
[2]

ISO 287 should be 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 should be used in laboratory procedures or is referred to in other International Standards

in which the concentration of an aqueous pulp suspension requires determination.
© ISO 2021 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 638-1:2021
---------------------- Page: 12 ----------------------
SIST EN ISO 638-1:2021
INTERNATIONAL STANDARD ISO 638-1:2021(E)
Paper, board, pulps and cellulosic nanomaterials —
Determination of dry matter content by oven-drying
method —
Part 1:
Materials in solid form
1 Scope

This document specifies an oven-drying method for the determination of the dry matter content in

paper, board, pulp and cellulosic nanomaterials in solid form, which all can be produced from virgin

and /or recycled materials.

It is also applicable to the determination of the dry matter content of paper and board for recycling.

The procedure is applicable to paper, board, and pulp and cellulosic nanomaterials which do not

contain any appreciable quantities of materials other than water that are volatile at the temperature of

105 °C ± 2 °C. It is used, for example, in the case of pulp, paper, and board and cellulosic nanomaterial

samples taken for chemical and physical tests in the laboratory, when a concurrent determination of

dry matter content is required.

This method is not applicable to the determination of the dry matter content of slush pulp or to the

determination of the saleable mass of pulp lots.
[1]

NOTE 1 ISO 638-2 specifies an oven-drying method for the determination of the dry matter content of

[2]

suspensions of cellulosic nanomaterials, ISO 287 specifies the determination of the moisture content of a lot

[3] [4]

of paper and board; ISO 4119 specifies the determination of stock concentration of pulps; ISO 801 (all parts)

specifies the determination of the saleable mass in lots.

NOTE 2 This document determines the total dry matter content of the sample, including any dissolved solids.

If only the cellulosic material content free of dissolved solids is desired, dissolved solids are removed prior to

measuring the dry matter content e.g. by washing or dialysis, taking care to retain all cellulosic material; in cases

[3]

where the sample is filterable without loss of cellulosic solids, ISO 4119 can be used to determine the stock

consistency (content of cellulosic material in solid form)
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. 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 7213, Pulps — Sampling for testing

EN 17085, Paper and board – Sampling procedures for paper and board for recycling

3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
© ISO 2021 – All rights reserved 1
---------------------- Page: 13 ----------------------
SIST EN ISO 638-1:2021
ISO 638-1:2021(E)
ISO and
...

SLOVENSKI STANDARD
oSIST prEN ISO 638-1:2020
01-oktober-2020

Papir, karton, lepenka in vlaknine ter celulozni nanomateriali - Določevanje suhe

snovi - Metoda sušenja v sušilniku - 2. del: Materiali v trdni obliki (ISO/DIS 638-

2:2020)

Paper, board, pulps and cellulosic nanomaterials - Determination of dry matter content -

Oven-drying method - Part 1: Materials in solid form (ISO/DIS 638-1:2020)
Papier, Pappe, Faserstoff und cellulosehaltige Nanomaterialien - Bestimmung des

Trockengehaltes - Wärmeschrankverfahren - Teil 1: Materialien in fester Form (ISO/DIS

638-1:2020)

Papiers, cartons et pâtes - Détermination de la teneur en matières sèches - Méthode par

séchage à l'étuve - Partie 1: Titre manque (ISO/DIS 638-1:2020)
Ta slovenski standard je istoveten z: prEN ISO 638-1
ICS:
85.040 Vlaknine Pulps
85.060 Papir, karton in lepenka Paper and board
oSIST prEN ISO 638-1:2020 en,fr,de

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

---------------------- Page: 1 ----------------------
oSIST prEN ISO 638-1:2020
---------------------- Page: 2 ----------------------
oSIST prEN ISO 638-1:2020
DRAFT INTERNATIONAL STANDARD
ISO/DIS 638-1
ISO/TC 6 Secretariat: SCC
Voting begins on: Voting terminates on:
2020-07-24 2020-10-16
Paper, board, pulps and cellulosic nanomaterials —
Determination of dry matter content — Oven-drying
method —
Part 1:
Materials in solid form
ICS: 85.060; 85.040
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
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
Reference number
NATIONAL REGULATIONS.
ISO/DIS 638-1:2020(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2020
---------------------- Page: 3 ----------------------
oSIST prEN ISO 638-1:2020
ISO/DIS 638-1:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 638-1:2020
ISO/DIS 638-1:2020(E)
Contents Page

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

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

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

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

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Principle ........................................................................................................................................................................................................................ 3

5 Apparatus ..................................................................................................................................................................................................................... 3

6 Sampling ........................................................................................................................................................................................................................ 3

7 Preparation of test pieces ........................................................................................................................................................................... 3

7.1 General ........................................................................................................................................................................................................... 3

7.2 Paper and board for recycling .................................................................................................................................................... 3

7.3 Paper, board, pulp and cellulosic nanomaterial in solid form ........................................................................ 3

8 Procedure..................................................................................................................................................................................................................... 4

9 Expression of results ........................................................................................................................................................................................ 5

9.1 Calculation .................................................................................................................................................................................................. 5

10 Test report ................................................................................................................................................................................................................... 5

Annex A (informative) Calculation of the moisture content ........................................................................................................ 6

Annex B (informative) Precision ............................................................................................................................................................................... 7

Bibliography .............................................................................................................................................................................................................................11

© ISO 2020 – All rights reserved iii
---------------------- Page: 5 ----------------------
oSIST prEN ISO 638-1:2020
ISO/DIS 638-1:2020(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 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 third edition cancels and replaces the second edition (ISO 638:2008), which has been technically

revised.
The main changes compared to the previous edition are as follows:

— Introduction of cellulosic nanomaterials and paper and board for recycling in the scope

— Split of the standard in two parts
— Technical revision of the procedure
— Editorial revision of the document
— Update of clause of precision
iv © ISO 2020 – All rights reserved
---------------------- Page: 6 ----------------------
oSIST prEN ISO 638-1:2020
ISO/DIS 638-1:2020(E)
Introduction

Determination of dry matter content and moisture content are carried out for different purposes.

This part of International Standard ISO 638 (ISO 638-1) should be used when the dry matter content is

needed to calculate the results for chemical analysis or physical testing, or to determine the moisture

content of paper and board for recycling. An example of this is where the results of a chemical analysis

for cadmium or manganese are required on the basis of the oven-dry mass of the sample.

Part 2 of International Standard ISO 638 (ISO 638-2) [1] is dedicated to the determination of the dry

matter content or moisture content of cellulosic nanomaterials in the form of suspensions.

ISO 287 [2] should be used for the purpose of determining the average moisture content and the

variation in moisture content (maximum and minimum values) of a lot. 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.

ISO 4119 [3] should be used in laboratory procedures or is referred to in other International Standards

in which the concentration of an aqueous pulp suspension requires determination.
© ISO 2020 – All rights reserved v
---------------------- Page: 7 ----------------------
oSIST prEN ISO 638-1:2020
---------------------- Page: 8 ----------------------
oSIST prEN ISO 638-1:2020
DRAFT INTERNATIONAL STANDARD ISO/DIS 638-1:2020(E)
Paper, board, pulps and cellulosic nanomaterials —
Determination of dry matter content — Oven-drying
method —
Part 1:
Materials in solid form
1 Scope

This document specifies an oven-drying method for the determination of the dry matter content in

paper, board and pulp and cellulosic nanomaterials in solid form, which all may be produced from

virgin and /or recycled materials.

It is also applicable to the determination of the dry matter content of paper and board for recycling.

The procedure is applicable to paper, board, and pulp and cellulosic nanomaterials which do not contain

any appreciable quantities of materials other than water that are volatile at the temperature of 105 °C

± 2 °C. It is used, for example, in the case of pulp, paper, and board and cellulosic nanomaterial samples

taken for chemical and physical tests in the laboratory, when a concurrent determination of dry matter

content is required.

This method is not applicable to the determination of the dry matter content of slush pulp or to the

determination of the saleable mass of pulp lots.

Note 1 ISO 638-2 [1] specifies an oven-drying method for the determination of the dry matter content in

suspensions of cellulosic nanomaterials, ISO 287 [2] specifies the determination of the moisture content of a lot

of paper and board; ISO 4119 [3] specifies the determination of stock concentration of pulps; ISO 801 (all parts)

[4] specifies the determination of the saleable mass in lots.

Note 2 This document determines the total dry matter content of the sample, including any dissolved solids.

If only the cellulosic material content free of dissolved solids is desired, dissolved solids should be removed prior

to measuring the dry matter content e.g. by washing or dialysis, taking care to retain all cellulosic material; in

cases where the sample is filterable without loss of cellulosic solids, ISO 4119 [3] can be used to determine the

stock consistency (content of cellulosic material in solid form).
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. 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 287:2009, Paper and board — Determination of moisture content of a lot — Oven-drying method

ISO 7213, Pulps — Sampling for testing

EN 17085, Paper and board – Sampling procedures for paper and board for recycling

ISO/TS 20477:2017, Nanotechnologies — Standard terms and their definition for cellulose nanomaterial

ISO/TS 80004-1:2015, Nanotechnologies — Vocabulary — Part 1: Core terms
© ISO 2020 – All rights reserved 1
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oSIST prEN ISO 638-1:2020
ISO/DIS 638-1:2020(E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
cellulosic nanomaterial
CNM

material composed predominantly of cellulose, with any external dimension in the nanoscale (3.5), or a

material having internal structure or surface structure in the nanoscale, with the internal structure or

surface structure composed predominantly of cellulose

Note 1 to entry: The term nanocellulose is an alternative to cellulosic nanomaterial.

Note 2 to entry: Some cellulosic nanomaterials can be composed of chemically modified cellulose.

[SOURCE: ISO/TS 20477:2017, 3.3.1, modified]
3.2
constant mass

mass of the test piece determined at the equilibrium condition after drying until the difference between

two successive dryings and weighings, separated in time by at least half the initial drying period, does

not exceed 0,1 % mass fraction of the test piece before drying
3.3
dry matter content

ratio of the mass of a test piece, after drying to constant mass at a temperature of 105 °C ± 2 °C under

specified conditions, to its mass before drying

Note 1 to entry: to entry: The dry matter content is usually expressed as a percentage mass fraction.

3.4
moisture content
content of
...

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