Bsi bs en 20105 n01 1995 (1999)

00565402 PDF BRITISH STANDARD BS EN 20105 N01 1995 ISO 105 N01 1993 Textiles — Tests for colour fastness — Part N01 Colour fastness to bleaching Hypochlorite The European Standard EN 20105 N01 1995 ha[.]

BRITISH STANDARD BS EN

20105-N01: 1995

ISO 105-N01: 1993

Textiles —

Tests for colour

fastness —

Part N01: Colour fastness to bleaching:

Hypochlorite

The European Standard EN 20105-N01:1995 has the status of a

British Standard

This British Standard, having

been prepared under the

direction of the Textiles and

Clothing Standards Policy

Committee, was published

under the authority of the

Standards Board and

comes into effect on

15 June 1995

© BSI 12-1999

The following BSI references

relate to the work on this

standard:

Committee reference TCM/25

Special announcement in

BSI News November 1992

ISBN 0 580 21438 9

Cooperating organizations

The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries:

Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y

France Association française de normalisation Germany Deutsches Institut für Normung e.V

Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland

Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portuguès da Qualidade Spain Asociación Española de Normalización y Certificación Sweden Standardiseringskommissionen i Sverige

Switzerland Association suisse de normalisation United Kingdom British Standards Institution

Amendments issued since publication

Amd No Date Comments

BS EN 20105-N01:1995

Contents

Page Cooperating organizations Inside front cover

Annex ZA (normative) Normative references to international publications with their relevant

National annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-references Inside back cover

ii © BSI 12-1999

National foreword

This British Standard has been prepared under the direction of the Textiles and Clothing Standards Policy Committee It is the English language version of

EN 20105-N01:1995 Textiles — Tests for colour fastness — Part N01: Colour fastness to bleaching: Hypochlorite, which is identical with ISO 105-N01:1993 published by the International Organization for Standardization (ISO)

The technical content of this British Standard is identical with that of the

corresponding method in BS 1006:1990 Methods of test for colour fastness of textiles and leather.

A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application

Compliance with a British Standard does not of itself confer immunity from legal obligations.

Summary of pages

This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 6, an inside back cover and a back cover

This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover

EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE NORM

EN 20105-N01

January 1995

ICS 59.080.10

Descriptors: Textiles, dyes, tests, determination, printing, colour fastness, bleaching, sodium hypochlorite

English version Textiles — Tests for colour fastness — Part N01: Colour

fastness to bleaching: Hypochlorite

(ISO 105-N01:1993)

Textiles — Essais de solidité des teintures —

Partie N01: Solidité des teintures au

blanchiment: Hypochlorite

(ISO 105-N01:1993)

Textilien — Farbechtheitsprüfungen — Teil N01: Bleichechtheit von Färbungen: Hypochlorit

(ISO 105-N01:1993)

This European Standard was approved by CEN on 1995-01-02 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

The European Standards exist 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,

Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,

Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland

and United Kingdom

CEN

European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung

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

© 1995 Copyright reserved to CEN members

Ref No EN 20105-N01:1995 E

© BSI 12-1999 2

Foreword

This European Standard has been prepared 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

July 1995, and conflicting national standards shall

be withdrawn at the latest by July 1995

According to the CEN/CENELEC Internal

Regulations, the following countries are bound to

implement this European Standard: Austria,

Belgium, Denmark, Finland, France, Germany,

Greece, Iceland, Ireland, Italy, Luxembourg,

Netherlands, Norway, Portugal, Spain, Sweden,

Switzerland, United Kingdom

NOTE Normative references to international publications are

listed in Annex ZA (normative).

EN 20105-N01:1995

1 Scope

This part of ISO 105 specifies a method for

determining the resistance of the colour of textiles of

all kinds and in all forms to the action of bleaching

baths containing sodium or lithium hypochlorite in

concentrations normally used in commercial

bleaching It is applicable mainly to natural and

regenerated cellulose materials

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 agreements 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 IEC and ISO maintain registers of

currently valid International Standards

ISO 105-A01:1989, Textiles — Tests for colour

fastness — Part A01: General principles of testing

ISO 105-A02:1993, Textiles — Tests for colour

fastness — Part A02: Grey scale for assessing change

in colour

ISO 105-C01:1989, Textiles — Tests for colour

fastness — Part C01: Colour fastness to

washing: Test 1

3 Principle

A specimen of the textile is agitated in a solution of

sodium or lithium hypochlorite, rinsed in water,

agitated in a hydrogen peroxide solution or sodium

hydrogen sulfite solution, rinsed and dried The

change in colour is assessed with the grey scale

4 Apparatus and reagents

4.1 Glass or glazed-porcelain container, which can

be closed, for specimen and bleaching solution

4.2 Hypochlorite solutions

Use one of the two solutions specified in 4.2.1

and 4.2.2.

4.2.1 Sodium hypochlorite (NaOCl) solution,

containing approximately 2 g of available chlorine

per litre, buffered at pH 11 ± 0,2 with 10 g of

anhydrous sodium carbonate (Na2CO3) per litre, at

a temperature of 20 °C ± 2 °C

To prepare this reagent, use commercially available

sodium hypochlorite solution This has the following

composition:

— active chlorine: 140 g/l to 160 g/l;

— sodium chloride: (NaCl): 120 g/l to 170 g/l;

— sodium hydroxide: (NaOH): 20 g/l maximum;

— sodium carbonate (Na2CO3): 20 g/l maximum;

— iron (Fe): 0,01 g/l maximum

Dilute 20,0 ml of the commercially available sodium hypochlorite solution to 1 litre with grade 3

water (4.6).

To 25 ml of this solution add excess potassium iodide (KI) and hydrochloric acid (HCl) and titrate the liberated iodine with a sodium thiosulfate

solution, c(Na2S2O3) = 0,1 mol/l, using starch as indicator

Let the volume of sodium thiosulfate solution

required be V ml.

For each litre of working solution at pH 11 ± 0,2 use

14 100/V ml of the diluted sodium hypochlorite solution;

10 g of anhydrous sodium carbonate

Dilute to 1 litre

All sodium hypochlorite solutions should be prepared just prior to use

4.2.2 Lithium hypochlorite (LiOCl) solution,

containing approximately 2 g of available chlorine per litre, buffered at pH 11 ± 0,2 with 10 g of anydrous sodium carbonate (Na2CO3) per litre, at a temperature of 20 °C ± 2 °C

To prepare this reagent, use solid lithium hypochlorite, which contains approximately 300 g of LiOCl per kilogram About 10 g of solid lithium hypochlorite dissolved in 1 litre of grade 3

water (4.6) yields a solution of the prescribed

concentration of approximately 2 g of available chlorine per litre

Prepare the lithium hypochlorite solution as

described in 4.2.1 for sodium hypochlorite.

4.3 Hydrogen peroxide solution,

containing 2,5 ml of hydrogen peroxide [30 % (m/m)

H2O2] per litre, or a solution containing 5 g of sodium hydrogen sulfite (NaHSO3) per litre

WARNING — Attention is drawn to the need for relevant safety precautions when using hydrogen peroxide.

4.4 Soap solution, containing 5 g of soap per litre

(see ISO 105-C01:1989, subclause 4.3), for wetting

out water-repellent fabrics

4.5 Grey scale for assessing change in colour,

complying with ISO 105-A02

4.6 Grade 3 water (see ISO 105-A01:1989,

subclause 8.2).

5 Test specimen

5.1 If the textile to be tested is fabric, use a specimen measuring 40 mm × 100 mm

4 © BSI 12-1999

5.2 If the textile to be tested is yarn, knit it into

fabric and use a piece measuring 40 mm × 100 mm,

or wind it closely round a piece of thin, inert

material measuring 40 mm × 100 mm to form a

layer having the thickness of only one yarn

5.3 If the textile to be tested is loose fibre, comb and

compress enough of it to form a sheet

measuring 40 mm × 100 mm; in order to support

the fibres, sew the sheet on a piece of fabric which

will not affect the action of the hypochlorite on the

specimen

6 Procedure

6.1 If the textile to be tested has a water-repellent

finish, wet out the specimen thoroughly in the soap

solution (4.4) at 25 °C to 30 °C Drain the specimen

of excess liquor so that it retains approximately its

dry mass of wetting-out solution, and immediately

place the specimen, opened out, in the sodium or

lithium hypochlorite solution (4.2) at 20 °C ± 2 °C at

a liquor ratio of 50 : 1

6.2 If the textile to be tested has no water-repellent

finish, wet out the specimen in grade 3 water (4.6)

at room temperature, remove the excess water

(see 6.1) and place the test specimen, opened out, in

the sodium or lithium hypochlorite solution (4.2)

at 20 °C ± 2 °C at a liquor ratio of 50 : 1

6.3 Close the container and allow the specimen to stand in the solution at 20 °C ± 2 °C for 60 min Avoid exposure to direct sunlight

6.4 Rinse the specimen thoroughly in cold, running tap-water, and then agitate it at room temperature

for 10 min in one of the solutions specified in 4.3.

6.5 Rinse the specimen thoroughly in cold, running tap-water, remove the excess water and dry the specimen by hanging it in air at a temperature not exceeding 60 °C

6.6 Assess the change in colour of the specimen with

the grey scale (4.5).

7 Test report

The test report shall include the following particulars:

a) the number and date of publication of this part

of ISO 105, i.e ISO 105-N01:1993;

b) all details necessary for the identification of the sample tested;

c) the numerical rating for the change in colour of the specimen

EN 20105-N01:1995

Annex ZA (normative)

Normative references to international publications with their relevant

publications

This European Standard incorporates by dated or undated reference, provisions form other publications These normative references are cited at the appropriate places in the text and the publications are listed hereafter For dated references, subsequent amendments to or revisions or any of these publications apply

to this European Standard only when incorporated in it by amendment or revision For undated references the latest edition of the publication referred to applies (including amendments)

ISO 105-A02 1993 Textiles — Tests for colour fastness —

Part A02: Grey scale for assessing change in colour

EN 20105-A02 1994 ISO 105-C01 1989 Textiles — Tests for colour fastness —

Part C01: Colour fastness to washing — Test 1 EN 20105-C01 1992

BS EN 20105-N01:1995

© BSI 12-1999

National annex NA (informative)

Committees responsible

The United Kingdom participation in the preparation of this European Standard was entrusted by the Textiles and Clothing Standards Policy Committee (TCM/-) to Technical Committee TCM/25 upon which the following bodies were represented:

Association of Consulting Scientists

Association of Manufacturers of Domestic Electrical Appliances

British Retail Consortium

British Textile Confederation

Home Laundering Consultative Council

International Wool Secretariat

Lambeg Industrial Research Association

Mail Order Traders’ Association

Ministry of Defence

National Wool Textile Export Corporation

Soap and Detergent Industry Association

Society of Dyers and Colourists

Textile Research Council (FCA)

National annex NB (informative)

Cross-references

Publication referred to Corresponding British Standard

ISO 105-A01:1989 BS EN 20105 Textiles — Tests for colour fastness

Part A01:1993 General principles of testing

ISO 105-A02:1993 BS EN 20105 Textiles — Tests for colour fastness

Part A02:1993 Grey scale for assessing change in colour

ISO 105-C01:1989 BS EN 20105 Textiles — Tests for colour fastness

Part C01:1992 Colour fastness to washing: Test 1

ISO 105-N01:

1993

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