SIST EN ISO 105-J02:1999
(Main)Textiles - Tests for colour fastness - Part J02: Instrumental assessment of relative whiteness (ISO 105-J02:1997, including Technical Corrigendum 1:1998)
Textiles - Tests for colour fastness - Part J02: Instrumental assessment of relative whiteness (ISO 105-J02:1997, including Technical Corrigendum 1:1998)
This part of EN 20105 specifies a method intended for quantifying the whiteness of textiles, including fluorescent materials.
Textilien - Farbechtheitsprüfungen - Teil J02: Instrumentelle Bestimmung des relativen Weißgrades (ISO 105-J02:1997, einschließlich Technische Korrektur 1:1998)
1.1 Dieser Teil von ISO 105 beschreibt eine Methode zur quantitativen Bestimmun des Weißgrades und des Farbstichs von Textilien einschließlich fluoreßierender Materialien. 1.2 Der Weißgrad, wie nach dieser Pru(fmethode bestimmt, ist eine Aussage daru(ber, wie weiß das Textil einem durchschnittlichen Beobachter erscheint. Der Farbstich, falls ungleich Null, ist ein Hinweis darauf, daß sich der Farbton weg von bla(ulichen (neutralen) Farbstich mit einer farbtongleichen Wellenla(nge von 466 mm nach ro(ter oder gru(ner verschoben hat.
Textiles - Essais de solidité des teintures - Partie J02: Evaluation instrumentale de la blancheur relative (ISO 105-J02:1997, Rectificatif Technique 1:1998, inclus)
La présente partie de l'ISO 105 spécifie une méthode permettant de quantifier la blancheur et la teinte des textiles, y compris pour les matériaux fluorescents. La blancheur mesurée à l'aide de cette méthode d'essai est une indication de la couleur blanche d'une surface textile telle qu'elle apparaît à un observateur moyen. La teinte, si elle est différente de zéro, est une indication du glissement vers le rouge ou vers le vert de la tonalité bleutée (neutre) de longueur d'onde dominante égale à 466 nm. Les formules recommandées de calcul de la blancheur et de la teinte sont celles de la CIE 1). Le facteur de réflexion étant fonction de la nature de la surface du textile, les comparaisons ne peuvent être faites qu'entre éprouvettes du même type de textile. L'application des formules est restreinte à des éprouvettes que l'on appelle «blanches» d'un point de vue commercial, qui ne diffèrent pas trop en couleur ou en fluorescence et qui sont mesurées pratiquement au même moment à l'aide du même instrument. Compte tenu de ces restrictions, les formules donnent des évaluations de la blancheur en valeur relative, mais non absolue, qui conviennent aux pratiques commerciales si l'on emploie des instruments de mesure offrant des caractéristiques techniques adaptées et modernes. Les nombreuses impuretés des textiles absorbent la lumière à onde courte, d'où l'aspect jaunâtre perçu par les observateurs. Une mesure de blancheur peut donc donner une indication du degré d'absence d'impuretés dans le textile. La mesure de la blancheur peut également permettre de déterminer les effets des composants bleuissants ou des agents azurants fluorescents (FWA) sur la blancheur des textiles.
Tekstilije - Preskušanje barvne obstojnosti - Del J02: Instrumentalno ocenjevanje relativne beline (IOS 105-J02:1997, vključno s Tehničnim popravkom 1:1998)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 105-J02:1999
01-november-1999
7HNVWLOLMH3UHVNXãDQMHEDUYQHREVWRMQRVWL'HO- ,QVWUXPHQWDOQRRFHQMHYDQMH
UHODWLYQHEHOLQH ,26- YNOMXþQRV7HKQLþQLPSRSUDYNRP
Textiles - Tests for colour fastness - Part J02: Instrumental assessment of relative
whiteness (ISO 105-J02:1997, including Technical Corrigendum 1:1998)
Textilien - Farbechtheitsprüfungen - Teil J02: Instrumentelle Bestimmung des relativen
Weißgrades (ISO 105-J02:1997, einschließlich Technische Korrektur 1:1998)
Textiles - Essais de solidité des teintures - Partie J02: Evaluation instrumentale de la
blancheur relative (ISO 105-J02:1997, Rectificatif Technique 1:1998, inclus)
Ta slovenski standard je istoveten z: EN ISO 105-J02:1999
ICS:
59.080.01 Tekstilije na splošno Textiles in general
SIST EN ISO 105-J02:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 105-J02:1999
INTERNATIONAL ISO
STANDARD 105-J02
Second edition
1997-12-15
Textiles — Tests for colour fastness —
Part J02:
Instrumental assessment of relative whiteness
Textiles — Essais de solidité des teintures —
Partie J02: Évaluation instrumentale de la blancheur relative
A
Reference number
ISO 105-J02:1997(E)
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SIST EN ISO 105-J02:1999
ISO 105-J02:1997(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.
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 ISO 105-J02 was prepared by Technical Committee
ISO/TC 38, Textiles, Subcommittee SC 1, Tests for coloured textiles and
colorants.
This second edition cancels and replaces the first edition
(ISO 105-J02:1987), which has been technically revised.
ISO 105 was previously published in thirteen “parts”, each designated by a
letter (e.g. “Part A”), with publication dates between 1978 and 1985. Each
part contained a series of “sections”, each designated by the respective
part letter and by a two-digit serial number (e.g. “Section A01”). These
sections are now being republished as separate documents, themselves
designated “parts” but retaining their earlier alphanumeric designations. A
complete list of these parts is given in ISO 105-A01.
Annex A forms an integral part of this part of ISO 105.
© ISO 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 • CH-1211 Genève 20 • 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 EN ISO 105-J02:1999
©
INTERNATIONAL STANDARD ISO ISO 105-J02:1997(E)
Textiles — Tests for colour fastness —
Part J02:
Instrumental assessment of relative whiteness
1Scope
1.1 This part of ISO 105 specifies a method intended for quantifying the whiteness and tint of textiles,
including fluorescent materials.
1.2 Whiteness as measured by this test method is an indication of how white the textile appears to an
average viewer. Tint, if other than zero, is an indication of a reddish or greenish hue having shifted away
from a bluish (neutral) hue with a dominant wavelength of 466 nm. The formulae for calculation of
1)
whiteness and tint are those recommended by the CIE .
1.3 Because reflectance is affected by the nature of the surface of the textile, comparisons can be made
only between specimens of the same type of textile.
1.4 The application of the formulae is restricted to specimens that are called "white" commercially, that do
not differ much in colour and fluorescence and that are measured on the same instrument at nearly the same
time. Within these restrictions, the formulae provide relative, but not absolute, evaluations of whiteness that
are adequate for commercial use when employing measuring instruments having suitable modern and
commercially available capabilities.
____________
1) International Commission on Illumination, Vienna.
1
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SIST EN ISO 105-J02:1999
©
ISO
ISO 105-J02:1997(E)
1.5 Many impurities in textiles absorb short wavelength light, resulting in a yellowish appearance to
observers. Therefore, a measurement of whiteness may be an indication of the degree to which a textile is
free from impurities.
1.6 The effect of blueing components or fluorescent whitening agents (FWAs) on the whiteness of textiles
may also be determined using the whiteness measurement.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this
part of ISO 105. At the time of publication, the editions indicated were valid. All standards are subject to
revision, and parties to agreement based on this part of ISO 105 are encouraged to investigate the possibility
of applying the most recent editions of the standards indicated below. Members of the IEC and ISO
maintain registers of currently valid International Standards.
2)
ISO 105-J01:— , Textiles — Test for colour fastness — Part J01: General principles for measurement of
surface colour.
3)
CIE Publication No. 15.2: 1986 , Colorimetry (second edition).
3)
CIE Publication No. 17.4:1987 , International Lighting Vocabulary.
4)
ASTM E 284-96b:1996 , ASTM Terminology of Appearance (Revised).
4)
ASTM E 308-96:1996 , Practice for computing the colors of objects by using the CIE system.
____________
2) To be published.
3) Available from CIE Central Bureau, Kegelgasse 27, A-1030 Vienna, Austria.
4) Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 USA.
2
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SIST EN ISO 105-J02:1999
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ISO 105-J02:1997(E)
3 Definitions
For the purposes of this part of ISO 105, the following definitions apply:
24
3.1 CIE chromaticity coordinates. The ratio of each of the tristimulus values of a psychophysical colour
to the sum of the tristimulus values.
3.2 CIE tristimulus values. The amounts of three non-real reference colour stimuli required to give a
colour match with the colour stimulus considered, and defined by the CIE for the CIE 1931 colorimetric
observer (2� standard observer) and the CIE 1964 supplementary colorimetric observer (10� standard
observer).
3.3 fluorescent whitening agent (FWA). Colorant that absorbs near ultraviolet (UV) radiation and re-
emits visible (violet-blue) radiation causing a yellowish material to which it has been applied to appear
whiter.
3.4 perfect reflecting diffuser. Ideal isotropic diffuser with reflectance of unity.
NOTES
1 An isotropic diffuser is one in which the spatial distribution of reflected radiation is such that the radiance or luminanc e is the
same in all directions in the hemisphere into which the radiation is reflected.
2 The perfect reflecting diffuser is the basis of calibration of reflectance measuring instruments. The equations for whiteness and
tint are formulated so that the CIE concept of the perfect reflecting diffuser has a whiteness index of 100,0 and a tint value of 0,0.
3.5 whiteness. The attribute by which an object colour is judged to approach a preferred white.
3.6 tint. The hue of a white material as influenced by the wavelength of peak emission or reflectance.
NOTE — These definitions are based on CIE publication 15.2, CIE publication 17.4 or ASTM E 284-96b.
3
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ISO 105-J02:1997(E)
4 Principle
The CIE tristimulus values are measured using a reflectance spectrophotometer or colorimeter, and the
whiteness and tint calculated from formulae based on the CIE chromaticity coordinates.
5 Apparatus and materials
5.1 Colour-measuring instrument, a reflectance spectrophotometer or colorimeter capable of measuring
or calculating CIE tristimulus values with at least one of the CIE specified geometries (45/0, 0/45) as
defined in ISO 105-J01 (d/0, 0/d). When integrating spheres are used for measuring fluorescent specimens,
the spectral power distribution of the illuminating system is altered by the reflected and emitted power from
the specimen. The use of the 45/0 or 0/45 condition is therefore preferable. If an integrating sphere
instrument is to be used, measurements should, if possible, be made with the specular component of
reflectance excluded.
5.2 Reference standard, the primary standard is the perfect reflecting diffuser (see 3.4). Secondary
ref
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