ISO INTERNATIONAL STANDARD 105-N03 Second edition 1993-10-01 Textiles -- Tests for colour fastness Part N03: Colour fastness to bleaching: Sodium chlorite (mild) TextilesEssais desoliditedesteintures Partie No3: Solidite des teintures au blanchiment: Chlorite de sodium (essai doux) ISO Reference number ISO 105-N03:1993(E) No reproduction or networking permitted without license from IHS Not for Resale ISO105-N03:1993(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies). The work technical committees. Each member body interested in a subject for 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 a vote. International Standard ISO 105-N03 was prepared by Technical Committee ISO/TC38,Textiles,Sub-CommitteeSC1,Testsforcoloured textilesand colorants. IS0 105-N:1978), of which it constitutes a minor revision. IsO 105 was previously published in thirteen "parts", each designated by a letter (e.g. "Part A"), with publication dates between 1978 and 1985. These sections are now being republished as separate documents, them- nations. A complete list of these parts is given in ISO 105-A01. C ISO1993 by any means, electronic or mechanical, including photocopying and microfilm, without per- mission in writing from the publisher. International Organization for Standardization Case Postale 56· CH-1211 Geneve 20·Switzerland Printed in Switzerland CopyrightInternational Organization for Standardization NoreproductionornetworkingpemitedwithoutlicensefromHS Not for Resale INTERNATIONALSTANDARD ISO105-N03:1993(E) Textiles - Tests for colour fastness Part N03: Colour fastness to bleaching: Sodium chlorite (mild) Scope 3 Principle 7 This part of ISO 105 specifies a method for deter- Aspecimenofthetextileincontactwithoneortwo mining the resistance of the colour of textiles com- specified adjacentfabricsis treatedin a sodium posed of natural and regenerated cellulose, and chlorite solution, rinsed and dried. The change in synthetic fibres, to the action of mild bleaching with colourofthespecimenandthe stainingof theadja- sodium chlorite as employed in textile processing. cent fabric(s) are assessed with the grey scales. 4 Apparatus and reagents 2 Normative references 4.1 Glass container, fitted with a reflux condenser The following standards contain provisions which, or other means of reducing evaporation of the bath, through reference in this text, constitute provisions thus preventing the need to modify the bath during of this part of ISO 105. At the time of publication, the editions indicated were valid. All standards are subject the test. to revision, and parties to agreements based on this part of IsO 105 are encouraged to investigate the 4.2 Sodium chlorite solution, 1 g/l, brought to possibility of applying the most recent editions of the pH 3,5 with acetic acid immediately before the test. standards indicated below. Members of IEC and ISO maintain registers of currently valid International The exact concentration of the sodium chlorite sol- Standards. ution employed is determined by titration with sodium thiosulfate solution. ISO105-A01:1989,Textiles- Testsforcolourfast ness - Part Ao1: General principles of testing. 4.3 Adjacent fabrics (see ISO 105-A01:1989, sub- ISO 105-A02:1993, Textiles - clause 8.3). -Tests for colour fast- ness - Part A02: Grey scale for assessing change in colour. Either: ISO 105-A03:1993, Textiles — Tests for colour fast- 4.3.1 A multifibre adjacent fabric, complying with ness - Part A03: Grey scale for assessing staining. ISO105-F10. ISO 105-F:1985,Textiles- -Te