SIST ISO 12040:1997

SLOVENSKI STANDARD
SIST ISO 12040:1997
01-december-1997
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Graphic technology -- Prints and printing inks -- Assessment of light fastness using
filtered xenon arc light
Technologie graphique -- Impressions et encres d'imprimerie -- Évaluation de la solidité
à la lumière au moyen d'une lampe à arc au xénon munie d'un filtre
Ta slovenski standard je istoveten z: ISO 12040:1997
ICS:
87.080 Barvila. Tiskarske barve Inks. Printing inks
SIST ISO 12040:1997 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ISO 12040:1997

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SIST ISO 12040:1997
INTERNATIONAL
STANDARD
First edition
1997-03-O 1
Graphic technology - Prints and printing
inks - Assessment of light fastness using
filtered xenon arc light
Technologie graphique - Impressions et encres d’imprimerie -
i‘valuation de la solidit A la /urn&e au moyen d’une lampe a arc au x&on
munie d’un filtre
Reference number
IS0 12040:1997(E)

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SIST ISO 12040:1997
IS0 12040:1997(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work of
preparing International Standards is normally carried out through IS0
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. IS0
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
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.
International Standard IS0 12040 was prepared by Technical Committee
ISO/TC 130, Graphic technology.
Annex A of this International Standard is for information only.
0 IS0 1997
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 l CH-1211 Geneve 20 l Switzerland
Internet central @ iso.ch
x.400
c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
ii

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SIST ISO 12040:1997
@ IS0 IS0 12040:1997(E)
Introduction
The method for evaluating light fastness described in this International
Standard using blue wool references is in technical conformity with the
method given in IS0 2835. However, according to the latter, natural
daylight shall be used to obtain a valid assessment of light fastness. This
International Standard describes an accelerated test method by specifying
the light source and filters for daylight simulation as well as exposure of the
test samples to artificial daylight.
In addition, this International Standard is partly in agreement with
IS0 105B02. For more information on apparatus and test methods,
IS0 105802 is recommended as a reference.
. . .
III

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SIST ISO 12040:1997
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SIST ISO 12040:1997
INTERNATIONAL STANDARD 0 IS0 IS0 12040: 1997(E)
Graphic technology - Prints and printing inks -
Assessment of light fastness using filtered xenon arc light
1 Scope
This International Standard specifies a method for assessing the light fastness of prints and printing inks, by giving
- the general test requirements for prints;
- the special test requirements for inks.
This International Standard applies to all print substrates such as paper, board, metals (thin metal sheets and plate)
and plastic films and to all printing processes
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this
International Standard. At the time of publication, the editions indicated were valid. All standards are subject to
revision, and parties to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain
registers of currently valid International Standards.
IS0 105-A02:1993, Textiles - Tests for co/our fastness - Pat? A02: Grey scale for assessing change in colour.
Part B02: Co/our fastness to artificial light: Xenon arc
IS0 105-B02:1994, Texti/es - Tests for co/our fastness -
fading lamp test.
IS0 2834:1981, Printing inks - Preparation of standardized prints for determination of resistance to physical and
chemical agents.
IS0 3664: 1975, Photography - Numina tion conditions for viewing colour transparencies and their reproductions.
3 Definitions
For the purposes of this International Standard, the following definitions apply.
3.1 light fastness of prints to filtered xenon arc light: Resistance of the print to the effi ects of a fixed light
source (filtered xenon arc light) without direct influence from the weather.
3.2 light fastness of a printing ink: Resistance of a standard print assessed in accordance with the instructions
given in this International Standard relating to prints.

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SIST ISO 12040:1997
0 IS0
IS0 12040: 1997(E)
4 Test methods
4.1 Principle
A test piece together with blue wool references is exposed to xenon arc light under specified conditions at the same
time.
Light fastness is evaluated by noting on the scale of blue wool references the rating of that reference which has
undergone a change similar to that of the test print.
4.2 Apparatus and materialsI)
4.2.1 Xenon arc lamp apparatus
The instrument chosen may be either air cooled or water cooled and shall be used as indicated by the manufacturer.
4.2.2 Blue wool references
The light fastness of prints is estimated by comparison with a standard range of eight blue dyes on wool cloth, their
degree of light fastness being in regular steps. These dyes are largely unaffected by variation in temperature and
humidity, and constitute an acceptable scale for the determination of the light fastness of all types of prints,
whatever their colour, type and intensity.
The light fastness of prints is expressed as the number corresponding to one of the ei
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