Paper and board -- Accelerated ageing

ISO 5630-7:2014 specifies a method for accelerating the ageing of paper and board through exposure to an elevated light irradiance and for assessing the effect of ageing on optical properties for the purpose of predicting stability to long-term natural ageing that occurs due to exposure to light. It is applicable to all types of paper and board whose surface is white or near white.

Papier et carton -- Vieillissement accéléré

General Information

Status
Published
Publication Date
11-Aug-2014
Current Stage
6060 - International Standard published
Start Date
18-Jun-2014
Completion Date
12-Aug-2014
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INTERNATIONAL ISO
STANDARD 5630-7
First edition
2014-08-15
Paper and board — Accelerated
ageing —
Part 7:
Exposure to light
Papier et carton — Vieillissement accéléré —
Partie 7: Exposition à la lumière
Reference number
ISO 5630-7:2014(E)
ISO 2014
---------------------- Page: 1 ----------------------
ISO 5630-7:2014(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: 2 ----------------------
ISO 5630-7:2014(E)
Contents Page

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

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

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

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

3 Principle ........................................................................................................................................................................................................................ 1

4 Apparatus ..................................................................................................................................................................................................................... 1

5 Sampling ........................................................................................................................................................................................................................ 2

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

7 Preparation of test pieces for ageing ............................................................................................................................................... 2

8 Procedure..................................................................................................................................................................................................................... 2

9 Calculation .................................................................................................................................................................................................................. 3

10 Test report ................................................................................................................................................................................................................... 3

Annex A (informative) Interpretation and limitations of ageing tests .............................................................................. 5

Bibliography ................................................................................................................................................................................................................................ 6

© ISO 2014 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 5630-7:2014(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.

ISO 5630 consists of the following parts, under the general title Paper and board — Accelerated ageing:

— Part 1: Dry heat treatment at 105 °C
— Part 3: Moist heat treatment at 80 °C and 65 % relative humidity
— Part 4: Dry heat treatment at 120 or 150 °C
— Part 5: Exposure to elevated temperature at 100 °C
— Part 6: Exposure to atmospheric pollution (nitrogen dioxide)
— Part 7: Exposure to light

Part 2: Moist heat treatment at 90 °C and 25 % relative humidity was withdrawn in 1992.

iv © ISO 2014 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 5630-7:2014(E)
Introduction

Exposure of paper or board to a hostile environment, such as some type of radiation, elevated

temperature, or chemical pollutant over a period of hours or days can provide information concerning

the natural changes that can occur in the material over a period of years.

This test method for accelerated ageing by exposure of paper to an elevated light flux has its origins

[2]

in the extensive ASTM research program which developed experimental procedures and studied a

range of printing and writing papers. The light irradiance specified in this part of ISO 5630 is much

lower than that recommended by the ASTM study which is considered too high and requires expensive

and hazardous equipment.

To get a full understanding of the stability of paper to long-term natural ageing effects, a combination

of test methods for accelerated ageing can be used. Application of accelerated ageing tests assumes that

the changes that occur under harsher than normal conditions have a strong positive correlation with

those occurring under “normal” conditions.
© ISO 2014 – All rights reserved v
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 5630-7:2014(E)
Paper and board — Accelerated ageing —
Part 7:
Exposure to light
1 Scope

This part of ISO 5630 specifies a method for accelerating the ageing of paper and board through exposure

to an elevated light irradiance and for assessing the effect of ageing on optical properties for the purpose

of predicting stability to long-term natural ageing that occurs due to exposure to light. It is applicable to

all types of paper and board whose surface is white or near white.
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 2470-1, Paper, board and pulps — Measurement of diffuse blue reflectance factor — Part 1: Indoor

daylight conditions (ISO brightness)

ISO 5631-1, Paper and board — Determination of colour by diffuse reflectance — Part 1: Indoor daylight

conditions (C/2°)
3 Principle

Sheets of paper are aged at an accelerated rate by exposing them to an elevated light irradiance. The

elevated irradiance accelerates changes in the optical properties which occur when paper is exposed

to “normal” light levels over an extended period. By comparing diffuse blue reflectance factor (ISO

brightness) and the b* CIELab colour coordinate before and after ageing, a measure of the stability of

the optical properties of the paper when exposed to light is obtained.
4 Apparatus
2 2

4.1 Light source, producing an even irradiance (total irradiance) to all test surfaces of 20 W/m ± 1 W/m

2 2

in the wavelength range 290 nm to 800 nm with a UV component of 1,0 W/m ± 0,1 W/m . The ratio of

the irradiance in the wavelength range 400 nm to 600 nm to that in the range 600 nm to 800 nm shall be

1,0 to 1,5 with all wavelengths over the range 400 nm to 700 nm present in the radiation.

The uniformity of the total irradiance shall be such that it does not vary by more than ±1 W/m on any

portion of the test surface of the specimen. If the light delivered by the source includes wavelengths

below 300 nm, these shall be removed by the use of a suitable glass filter.

The total irradiance of the light source at the specimen surface shall be checked at regular intervals to

maintain it within a range of ±1 W/m of its nominal value (value when first tested or first used) with

a UV component maintained within ±0,1 W/m . If the irradiance is outside either of these ranges, the

lamp(s) shall be replaced.
© ISO 2014 –
...

DRAFT INTERNATIONAL STANDARD
ISO/DIS 5630-7
ISO/TC 6/SC 2 Secretariat: SIS
Voting begins on: Voting terminates on:
2013-08-23 2013-11-23
Paper and board — Accelerated ageing —
Part 7:
Exposure to light
Papier et carton — Vieillissement accéléré —
Partie 7: Exposition à la lumière
ICS: 85.060
THIS DOCUMENT IS A DRAFT CIRCULATED
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
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 5630-7:2013(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 2013
---------------------- Page: 1 ----------------------
ISO/DIS 5630-7:2013(E)
Copyright notice

This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as

permitted under the applicable laws of the user’s country, neither this ISO draft nor any extract

from it may be reproduced, stored in a retrieval system or transmitted in any form or by any means,

electronic, photocopying, recording or otherwise, without prior written permission being secured.

Requests for permission to reproduce should be addressed to 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
Reproduction may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.
ii © ISO 2013 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/DIS 5630-7
Contents Page

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

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

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

3 Principle ................................................................................................................................................. 1

4 Apparatus ............................................................................................................................................... 1

5 Sampling ................................................................................................................................................ 2

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

7 Preparation of test pieces for ageing .................................................................................................. 2

8 Procedure ............................................................................................................................................... 2

9 Calculation ............................................................................................................................................. 3

10 Test report .............................................................................................................................................. 4

Annex A (informative) Interpretation and limitations of ageing tests .......................................................... 5

Bibliography ........................................................................................................................................................ 6

© ISO 2002 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/DIS 5630-7
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.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

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.

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.

ISO 5630-7 was prepared by Technical Committee ISO/TC 6, Paper, board and pulps, Subcommittee SC 2,

Test methods and quality specifications for paper and board.

ISO 5630 consists of the following parts, under the general title Paper and board — Accelerated ageing:

 Part 1: Dry heat treatment at 105 degrees C
 Part 3: Moist heat treatment at 80 degrees C and 65 % relative humidity
 Part 4: Dry heat treatment at 120 or 150 degrees C
 Part 5: Exposure to elevated temperature at 100 degrees Celsius
 Part 6: Exposure to atmospheric pollution (nitrogen dioxide)
 Part 7: Exposure to light

Exposure of paper or board to a hostile environment, such as some type of radiation, elevated temperature, or

chemical pollutant over a period of hours or days may provide information concerning the natural changes that

may occur in the material over a period of years.

This test method for accelerated ageing by exposure of paper to an elevated light flux has its origins in the

[1]

extensive ASTM research program which developed experimental procedures and studied a range of

printing and writing papers. The light irradiance specified in this part of ISO 5630 is much lower than that

recommended by the ASTM study which is considered too high and requires expensive and hazardous

equipment.

To get a full understanding of the stability of paper to long term natural ageing effects, a combination of test

methods for accelerated ageing should be used. Application of accelerated ageing tests assumes that the

changes that occur under harsher than normal conditions have a strong positive correlation with those

occurring under ‘normal’ conditions.
iv © ISO 2002 – All rights reserved
---------------------- Page: 4 ----------------------
DRAFT INTERNATIONAL STANDARD ISO/DIS 5630-7
Paper and board — Accelerated ageing — Part 7: Exposure to
light
1 Scope

This part of ISO 5630 specifies a method for accelerating the ageing of paper and board through exposure to

an elevated light irradiance and for assessing the effect of ageing on optical properties for the purpose of

predicting stability to long term natural ageing that occurs due to exposure to light. It is applicable to all types

of paper and board whose surface is white or near white.
2 Normative references

The following referenced documents are indispensable for the application 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 187, Paper, board and pulps – Standard atmosphere for conditioning and testing and procedure for

monitoring the atmosphere and conditioning of samples
ISO 2470-1, Paper – Determination of ISO brightness

ISO 5631-1, Paper and board – Determination of colour by diffuse reflectance – Part 1: Indoor daylight

conditions (C/2°)
3 Principle

Sheets of paper are aged at an accelerated rate by exposing them to an elevated light irradiance. The

elevated irradiance accelerates changes in the optical properties which occur when paper is exposed to

‘normal’ light levels over an extended period. By comparing diffuse blue reflectance factor (ISO brightness)

and the b* CIEL*a*b* colour coordinate before and after ageing, a measure of the stability of the optical

properties of the paper when exposed to light is obtained.
4 Apparatus
4.1 A light source, with the following characteristics:

Producing an even irradiance (total irradiance) to all test surfaces of 20 ± 1 W/m in the wavelength range

290 nm to 800 nm with a UV component of 1,0 ± 0,1 W/m . The ratio of the irradiance in the wavelength

range 400 nm to 600 nm to that in the range 600 nm to 800 nm shall be 1,0 to 1,5 with all wavelengths

over the range 400 nm to 700 nm present in the radiation.

The uniformity of the total irradiance shall be such that it does not vary by more than ± 1 W/m on any portion

of the test surface of the specimen. If the light delivered by the source includes wavelengths below 300 nm,

these shall be removed by the use of a suitable glass filter.

The total irradiance of the light source at the specimen surface shall be checked at regular intervals to

maintain it within a range of ± 1 W/m of its nominal value (value when first tested or first used) with a UV

component maintained within ± 0,1 W/m . If the irradiance is outside either of these ranges, the lamp(s) shall

be replaced.
© ISO 2002 – All rights reserved 1
---------------------- Page: 5 ----------------------
ISO/DIS 5630-7

4.2 Light chamber, of a size sufficient to mount the number of test pieces required for testing (8) in such a

way that all of the surface area on one side of each specimen is exposed uniformly to the specified irradiance

(4.1).
4.3 System for controlling the temperat
...

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