SVENSK STANDARD SS-EN ISO 105-J02

SVENSK STANDARD SS-EN ISO 105-J02

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ICS 59.080.01

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Textiles – Tests for colour

fastness – Part J02: Instrumental assessment of relative whiteness (ISO 105-J02:1997, including Tech- nical Corrigendum 1:1998)

The European Standard EN ISO 105-J02:1999 has the status of a Swedish Standard. This docu- ment contains the official English version of EN ISO 105-J02: 1999.

Swedish Standards corresponding to documents referred to in this Standard are listed in ”Catalogue of Swedish Standards”, issued by SIS. The Cata- logue lists, with reference number and year of Swedish approval, International and European Standards approved as Swedish Standards as well as other Swedish Standards.

Textil – Färghärdighetsprovning – Del J02: Instrumentell bedömning av relativ vithet (ISO 105-J02:1997 inklusive Teknisk Rättelse 1:1998)

Europastandarden EN ISO 105-J02:1999 gäller som svensk standard. Detta dokument innehåller den officiella engelska versionen av EN ISO 105-J02:

1999.

Motsvarigheten och aktualiteten i svensk standard till de publikationer som omnämns i denna stan- dard framgår av ”Katalog över svensk standard”, som ges ut av SIS. I katalogen redovisas interna- tionella och europeiska standarder som fastställts som svenska standarder och övriga gällande svenska standarder.

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM

EN ISO 105-J02

May 1999

ICS 59.080.01

English version

Textiles - Tests for colour fastness - Part J02: Instrumental assessment of relative whiteness (ISO 105-J02:1997, including

Technical Corrigendum 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)

Textilien - Farbechtheitsprüfungen - Teil J02: Instrumentelle Bestimmung des relativen Weißgrades (ISO 105-J02:1997,

einschließlich Technische Korrektur 1:1998)

This European Standard was approved by CEN on 18 April 1999.

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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION C O M I T É E U R O P É E N D E N O R M A L I S A T I O N E U R O P Ä I S C H E S K O M I T E E F Ü R N O R M U N G

Central Secretariat: rue de Stassart, 36 B-1050 Brussels

© 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.

Ref. No. EN ISO 105-J02:1999 E

Foreword

The text of the International Standard from Technical Committee ISO/TC 38

"Textiles" of the International Organization for Standardization (ISO) has been taken over as an European Standard by Technical Committee CEN/TC 248 "Textiles and textile products”, the secretariat of which is held by BSI.

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 November 1999, and conflicting national standards shall be withdrawn at the latest by November 1999.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.

Endorsement notice

The text of the International Standard ISO 105-J02:1997 has been approved by CEN as a European Standard without any modification.

NOTE: Normative references to International Standards are listed in annex ZA (normative).

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EN ISO 105-J02:1999

Textiles — Tests for colour fastness — Part J02:

Instrumental assessment of relative whiteness

1 Scope

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 whiteness and tint are those recommended by the CIE¹⁾.

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.

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1) International Commission on Illumination, Vienna.

Page 3 EN ISO 105-J02:1999

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.

ISO 105-J01:—²⁾, Textiles — Test for colour fastness — Part J01: General principles for measurement of surface colour.

CIE Publication No. 15.2: 1986³⁾, Colorimetry (second edition).

CIE Publication No. 17.4:1987³⁾, International Lighting Vocabulary.

ASTM E 284-96b:1996⁴⁾, ASTM Terminology of Appearance (Revised).

ASTM E 308-96:1996⁴⁾, 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.

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EN ISO 105-J02:1999