prEN ISO 187

Paper, board and pulps - Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples (ISO/DIS 187:2022)

Papier, Pappe und Zellstoff– Normalklima für die Vorbehandlung und Prüfung und Verfahren zur Überwachung des Klimas und der Probenvorbehandlung (ISO/DIS 187:2022)

Papier, carton et pâtes - Atmosphère normale de conditionnement et d'essai et méthode de surveillance de l'atmosphère et de conditionnement des échantillons (ISO/DIS 187:2022)

Papir, karton, lepenka in vlaknine - Standardna atmosfera za kondicioniranje in preskušanje ter postopek za nadzor atmosfere in kondicioniranje vzorcev (ISO/DIS 187:2022)

General Information

• Status: Not Published
• ICS: 85.040 - Pulps
• ICS: 85.060 - Paper and board
• Technical Committee: CEN/TC 172 - Pulp, paper and board
• Ref Project: oSIST prEN ISO 187:2022 - Paper, board and pulps - Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples (ISO/DIS 187:2022)

RELATIONS

• Revised: EN 20187:1993 - Paper, board and pulps - Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples (ISO 187:1990)
• Effective Date: 15-Jan-2020

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN ISO 187:2022
01-marec-2022
Papir, karton, lepenka in vlaknine - Standardna atmosfera za kondicioniranje in
preskušanje ter postopek za nadzor atmosfere in kondicioniranje vzorcev (ISO/DIS
187:2022)
Paper, board and pulps - Standard atmosphere for conditioning and testing and
procedure for monitoring the atmosphere and conditioning of samples (ISO/DIS
187:2022)
Papier, Pappe und Zellstoff– Normalklima für die Vorbehandlung und Prüfung und
Verfahren zur Überwachung des Klimas und der Probenvorbehandlung (ISO/DIS
187:2022)

Papier, carton et pâtes - Atmosphère normale de conditionnement et d'essai et méthode

de surveillance de l'atmosphère et de conditionnement des échantillons (ISO/DIS
187:2022)
Ta slovenski standard je istoveten z: prEN ISO 187
ICS:
85.040 Vlaknine Pulps
85.060 Papir, karton in lepenka Paper and board
oSIST prEN ISO 187:2022 en,fr,de

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

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oSIST prEN ISO 187:2022
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oSIST prEN ISO 187:2022
DRAFT INTERNATIONAL STANDARD
ISO/DIS 187
ISO/TC 6/SC 2 Secretariat: SIS
Voting begins on: Voting terminates on:
2022-01-14 2022-04-08
Paper, board and pulps — Standard atmosphere for
conditioning and testing and procedure for monitoring the
atmosphere and conditioning of samples

Papier, carton et pâtes — Atmosphère normale de conditionnement et d'essai et méthode de surveillance

de l'atmosphère et de conditionnement des échantillons
ICS: 85.060; 85.040
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
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
Reference number
NATIONAL REGULATIONS.
ISO/DIS 187:2022(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 2022
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oSIST prEN ISO 187:2022
ISO/DIS 187:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022

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
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Phone: [phone]
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Website: www.iso.org
Published in Switzerland
© ISO 2022 – All rights reserved
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oSIST prEN ISO 187:2022
ISO/DIS 187:2022(E)
Contents Page

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

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

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

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

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

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

5 Standard atmosphere ..................................................................................................................................................................................... 1

6 Conditioning procedure ............................................................................................................................................................................... 2

6.1 Pre-conditioning of the sample ................................................................................................................................................ 2

6.2 Conditioning.............................................................................................................................................................................................. 2

6.3 Testing ............................................................................................................................................................................................................ 2

7 Test report .................................................................................................................................................................................................................. 2

Annex A (normative) Measurement of temperature and relative humidity .............................................................4

Annex B (informative) Interdependence of temperature and relative humidity ...............................................5

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

iii
© ISO 2022 – All rights reserved
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oSIST prEN ISO 187:2022
ISO/DIS 187:2022(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: Foreword - Supplementary information

ISO 187 was prepared by Technical Committee 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 187:1990), which has been technically

revised with the following main changes:
— Revised Introduction
— Normative references have been removed;
— Content added to clause 5 and 6;
— Annex A has been simplified.
© ISO 2022 – All rights reserved
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oSIST prEN ISO 187:2022
ISO/DIS 187:2022(E)
Introduction

The physical properties of paper are affected by its moisture content which, in turn, is dependent on

the relative humidity of the surrounding atmosphere and its history. In order that tests may be made

on paper in a defined physical state, it is brought into equilibrium in an atmosphere of standardized

temperature and relative humidity, and tested in that atmosphere.

The moisture content of a given paper in equilibrium with a given atmosphere varies according to

whether the equilibrium is reached by sorption or by desorption of moisture and how far the moisture

content is from its equilibrium value. This hysteresis influences those physical properties that change

with moisture content. Preconditioning paper from low relative humidity and then bringing it into

the standard atmosphere will avoid most of the hysteresis effect and typically result in the moisture

content of a given sample being within 0.15% when the sample is later conditioned to 50% r.h. and 23°C.

Unless otherwise specified, the equilibrium condition should be attained from a low relative humidity.

For a number of years three standard test atmospheres had been in common use:
20 °C/65 % r.h.;
23 °C/50 % r.h. and
27 °C/65 % r.h.

Since 1993 the atmosphere of 23°C /50% r.h. has been considered the ISO standard test atmosphere for

testing of pulp, paper, and board. However, this atmosphere may be difficult to attain in some countries

located in tropical zones, and in such countries the 27°C /65% r.h. atmosphere is permitted.

© ISO 2022 – All rights reserved
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oSIST prEN ISO 187:2022
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oSIST prEN ISO 187:2022
DRAFT INTERNATIONAL STANDARD ISO/DIS 187:2022(E)
Paper, board and pulps — Standard atmosphere for
conditioning and testing and procedure for monitoring the
atmosphere and conditioning of samples
1 Scope

This International Standard specifies the standard atmospheres for conditioning and testing pulp,

paper and board, the conditioning procedure and the procedures for measuring the temperature and

relative humidity.

For the conditioning of laboratory sheets in accordance with ISO 5269-1 or 5269-3 using the

conventional sheet former, the standard atmosphere is that defined in this document but the sheets are

not preconditioned.
2 Normative references
There are no normative references in this document.
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 https:// www .electropedia .org/
3.1
relative humidity (r.h.)

ratio, expressed as a percentage, of the actual water vapour content of the air to the water vapour

content of air saturated with water vapour at the same temperature and pressure.
3.2
conditioning

process of establishing a reproducible moisture content equilibrium of a sample in an atmosphere of

specified temperature and relative humidity.

Note 1 to entry: This equilibrium is considered to be attained when the results of two consecutive weighings of

the sample, carried out at an interval of time of not less than 1 h, do not differ by more than 0.25 %.

4 Principle
Exposure o
...