General methods of test for pigments and extenders - Part 15: Comparison of resistance to light of coloured pigments of similar types (ISO 787-15:2019)

This document describes a general method of test for comparing the resistance to light of samples of similar types of coloured pigments (agreed reference pigment and test sample). Two methods of exposure are described in this document. In method A, the material is exposed under glass to natural light. In method B, the material is exposed to direct artificial light.

Allgemeine Prüfverfahren für Pigmente und Füllstoffe - Teil 15: Vergleich der Beständigkeit bei Belichtung von Buntpigmenten ähnlichen Typs (ISO 787-15:2019)

Dieses Dokument legt ein allgemeines Prüfverfahren zum Bestimmen der Beständigkeit bei Belichtung von
Proben ähnlicher Buntpigmentarten (vereinbartes Bezugspigment und Probe) fest.
In diesem Dokument werden zwei Belichtungsverfahren beschrieben. Bei Verfahren A wird das Material
unter Glas mit natürlichem Tageslicht belichtet, bei Verfahren B direkt mit künstlichem Licht.

Méthodes générales d'essai des pigments et matières de charge - Partie 15: Comparaison de la résistance à la lumière des pigments colorés de types semblables (ISO 787-15:2019)

Le présent document décrit une méthode générale d'essai pour la comparaison de la résistance à la lumière de deux échantillons de pigments colorés de types semblables (pigment de référence agréé et échantillon pour essai).
Deux méthodes d'exposition sont décrites dans le présent document. Dans la méthode A, le matériau est exposé sous verre à la lumière naturelle. Dans la méthode B, le matériau est exposé directement à une lumière artificielle.

Splošne metode preskušanja pigmentov in polnil - 15. del: Primerjava svetlobne obstojnosti barvnih pigmentov podobnih vrst (ISO 787-15:2019)

Ta dokument opisuje splošno metodo preskušanja za primerjavo svetlobne obstojnosti vzorcev barvnih pigmentov podobnih vrst (dogovorjenega referenčnega pigmenta in preskusnega vzorca). V tem dokumentu sta opisani dve metodi izpostavljanja. Pri metodi A je material pod steklom izpostavljen naravni svetlobi. Pri metodi B je material neposredno izpostavljen umetni svetlobi.

General Information

Status
Published
Public Enquiry End Date
03-Jul-2019
Publication Date
06-Nov-2019
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
09-Oct-2019
Due Date
14-Dec-2019
Completion Date
07-Nov-2019

RELATIONS

Buy Standard

Standard
SIST EN ISO 787-15:2019
English language
15 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN ISO 787-15:2019
01-december-2019
Nadomešča:
SIST EN ISO 787-15:1997
Splošne metode preskušanja pigmentov in polnil - 15. del: Primerjava svetlobne
obstojnosti barvnih pigmentov podobnih vrst (ISO 787-15:2019)

General methods of test for pigments and extenders - Part 15: Comparison of resistance

to light of coloured pigments of similar types (ISO 787-15:2019)
Allgemeine Prüfverfahren für Pigmente und Füllstoffe - Teil 15: Vergleich der
Beständigkeit bei Belichtung von Buntpigmenten ähnlichen Typs (ISO 787-15:2019)
Méthodes générales d'essai des pigments et matières de charge - Partie 15:

Comparaison de la résistance à la lumière des pigments colorés de types semblables

(ISO 787-15:2019)
Ta slovenski standard je istoveten z: EN ISO 787-15:2019
ICS:
87.060.10 Pigmenti in polnila Pigments and extenders
SIST EN ISO 787-15:2019 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN ISO 787-15:2019
---------------------- Page: 2 ----------------------
SIST EN ISO 787-15:2019
EN ISO 787-15
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2019
EUROPÄISCHE NORM
ICS 87.060.10 Supersedes EN ISO 787-15:1995
English Version
General methods of test for pigments and extenders - Part
15: Comparison of resistance to light of coloured pigments
of similar types (ISO 787-15:2019)

Méthodes générales d'essai des pigments et matières Allgemeine Prüfverfahren für Pigmente und Füllstoffe -

de charge - Partie 15: Comparaison de la résistance à la Teil 15: Vergleich der Beständigkeit bei Belichtung von

lumière des pigments colorés de types semblables (ISO Buntpigmenten ähnlichen Typs (ISO 787-15:2019)

787-15:2019)
This European Standard was approved by CEN on 11 August 2019.

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

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 787-15:2019 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 787-15:2019
EN ISO 787-15:2019 (E)
Contents Page

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

---------------------- Page: 4 ----------------------
SIST EN ISO 787-15:2019
EN ISO 787-15:2019 (E)
European foreword

This document (EN ISO 787-15:2019) has been prepared by Technical Committee ISO/TC 256

"Pigments, dyestuffs and extenders" in collaboration with Technical Committee CEN/TC 298 “Pigments

and extenders” 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 March 2020, and conflicting national standards shall

be withdrawn at the latest by March 2020.

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 787-15:1995.

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 787-15:2019 has been approved by CEN as EN ISO 787-15:2019 without any

modification.
---------------------- Page: 5 ----------------------
SIST EN ISO 787-15:2019
---------------------- Page: 6 ----------------------
SIST EN ISO 787-15:2019
INTERNATIONAL ISO
STANDARD 787-15
Second edition
2019-08
General methods of test for pigments
and extenders —
Part 15:
Comparison of resistance to light of
coloured pigments of similar types
Méthodes générales d'essai des pigments et matières de charge —
Partie 15: Comparaison de la résistance à la lumière des pigments
colorés de types semblables
Reference number
ISO 787-15:2019(E)
ISO 2019
---------------------- Page: 7 ----------------------
SIST EN ISO 787-15:2019
ISO 787-15:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

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 2019 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 787-15:2019
ISO 787-15:2019(E)
Contents Page

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

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

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

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

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

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

5 Apparatus and materials.............................................................................................................................................................................. 2

6 Sampling ........................................................................................................................................................................................................................ 4

7 Procedure..................................................................................................................................................................................................................... 5

7.1 Preparation of the test specimens .......................................................................................................................................... 5

7.2 Exposure of the test specimens ................................................................................................................................................ 5

8 Test report ................................................................................................................................................................................................................... 5

Bibliography ................................................................................................................................................................................................................................ 7

© ISO 2019 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 787-15:2019
ISO 787-15:2019(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 256, Pigments, dyestuffs and extenders.

This second edition cancels and replaces the first edition (ISO 787-15:1986), of which it constitutes a

minor revision. The changes compared to the previous edition are as follows:

— Clause 3 on “Terms and definitions”, with a general reference to ISO 18451-1, has been added;

— a bibliography has been added;
— the text has been editorially revised.
A list of all parts in the ISO 787 series can be found on the ISO website.

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 2019 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 787-15:2019
ISO 787-15:2019(E)
Introduction

The terms “resistance to light” and “light fastness (or colour fastness)” describe the resistance of a

material to change in its appearance as a result of exposure to light. The magnitude of the change, if any,

is influenced by the quantity and quality of the light to which the material is exposed, and by the nature

and composition of the material itself. Two compositions, each consisting of identical components but in

different proportions, may not have the same resistance to light. Also, two compositions each consisting of

the same proportions of similar, but not identical, components may not have the same resistance to light.

When exposed to natural light, the conditions of the test vary continuously because of the large number

of variables (for example intensity and spectral distribution of the light, temperature, relative humidity,

and the amount and nature of atmospheric contaminants) and therefore results cannot be related to

similar tests carried out on other occasions. Consequently, expressing the results as a function of time

alone is not recommended.

These considerations form the basis for the comparison of light fastness of two different samples

of a coloured pigment. Each sample is incorporated in the same proportion in otherwise identical

compositions and these compositions, in a suitable form, are examined for any difference in their

change of appearance after exposure to the same quantity and quality of light. In order to comply with

these exposure conditions, it is necessary for the compositions to be exposed side by side at the same

time to the same light source for the same period of time.

In addition, the light fastness of a pigment may be affected by the presence of other pigments such as

titanium dioxide. This important aspect may be accommodated in document by allowing the agreed

binder (medium) to consist of a dispersion of such a pigment. The test procedure is then followed as

described.

The extent, to which the change on exposure is allowed to proceed before the comparison is made, may

be of importance. It is unrealistic to assess the exposures when the change is only equivalent to the

first perceptible change, but it is also inadvisable to wait until the amount of change is large. Thus, it is

recommended that comparisons of change of appearance be made when the amount of
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.