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1、BRITISH STANDARD BS EN 648:2003 Paper and board intended to come into contact with foodstuffs Determination of the fastness of fluorescent whitened paper and board The European Standard EN 648:2003 has the status of a British Standard ICS 67.250; 85.060 ? Licensed Copy: sheffieldun sheffieldun, na,
2、Mon Nov 13 14:32:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 648:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 27 March 2003 BSI 27 March 2003 ISBN 0 580 41475 2 National foreword This British Standard is the official English l
3、anguage version of EN 648:2003. It supersedes BS EN 648:1994 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee CW/47, Materials and articles in contact with foodstuffs, to Subcommittee CW/47/3, Paper and board in contact with foodstuffs, which has the r
4、esponsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entit
5、led “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance
6、 with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related inte
7、rnational and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 7 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendment
8、s issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 14:32:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 648 March 2003 ICS 67.250; 85.060Supersedes EN 648:1993 English version Paper and board int
9、ended to come into contact with foodstuffs - Determination of the fastness of fluorescent whitened paper and board Papier et carton destins entrer en contact avec les denres alimentaires - Dtermination de la solidit du papier et du carton blanchis par des agents dazurage fluorescents Papier und Papp
10、e vorgesehen fr den Kontakt mit Lebensmitteln - Bestimmung der Farbechtheit von optisch aufgehelltem Papier und Pappe This European Standard was approved by CEN on 18 December 2002. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving th
11、is 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 Management Centre or to any CEN member. This European Standard exists in three official versions (En
12、glish, 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Repu
13、blic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Managemen
14、t Centre: rue de Stassart, 36 B-1050 Brussels 2003 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 648:2003 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 14:32:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 648:2003 (E)
15、 2 Contents page Foreword3 1Scope 3 2Normative references 3 3Terms and definitions3 4Principle4 5Test materials and equipment4 6Reagents.4 7Sampling.5 8Preparation of sample .5 9Procedure A (long duration contact) .5 10Procedure B (short time contact).5 11Comparison papers .6 11.1Solutions for compa
16、rison papers.6 11.2Preparation of fluorescent whitened comparison papers.6 12Evaluation.7 13Test report 7 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 14:32:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 648:2003 (E) 3 Foreword This document EN 648:2003 has been prepared by Technical Com
17、mittee CEN/TC 172 “Pulp, paper and board“, the secretariat of which is held by DIN. 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 September 2003, and conflicting national standards shall be with
18、drawn at the latest by September 2003. This document supersedes EN 648:1993. With regard to EN 648:1993 the following changes have been made: a) definition changed; b) addition of the test material “glass fibre paper“; c) modified description of “preparation of fluorescent whitened comparison papers
19、“; d) guideline for the evaluation modified; e) editorial updating. 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, G
20、reece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. 1 Scope This European Standard specifies procedures for the testing of fluorescent whitened paper and board intended to come into contact with foods
21、tuffs. Two procedures are given. Procedure A for contact of long duration (e.g. food packaging) and procedure B for contact of short duration (e.g. napkins, kitchen papers, household papers). 2 Normative references This European Standard incorporates by dated or undated reference, provisions from ot
22、her 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 of any of these publications apply to this European Standard only when incorporated in it by amendment
23、or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN ISO 186, Paper and board Sampling to determine average quality (ISO 186:2002). ISO 8787, Paper and board Determination of capillary rise Klemm method. 3 Terms and definitions For
24、the purposes of this European Standard, the following term and definition apply. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 14:32:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 648:2003 (E) 4 3.1 fastness lack of transfer of fluorescent whitening agent from a paper to a glass fibre pap
25、er saturated with a test fluid, evaluated visually under UV-light against a series of comparison papers 4 Principle A sample is brought into contact with glass fibre papers which have been saturated with a test fluid and placed under load for a given time. The staining of the glass fibre paper is ev
26、aluated by comparison with a series of fluorescent whitened comparison papers. The test fluids used are water, dilute acetic acid, sodium carbonate solution and olive oil, depending on the type of food contact expected. 5 Test materials and equipment 5.1Glass fibre papers of 60 mm x 90 mm. The glass
27、 fibre papers shall meet the following conditions: a) grammage 70 g/m; b) capillary rise of 190 mm to 210 mm in 10 min in accordance with ISO 8787; c) free from fluorescent whitening and wet strength agents; d) free from cellulosic fibres. 5.2Glass fibre papers with a diameter of 30 mm. The glass fi
28、bre papers shall meet the same conditions as in 5.1. 5.3Watch glass dish with a diameter of 40 mm. 5.4Glass plates, 60 mm x 90 mm. 5.5Polyethylene film, uncoloured and transparent. 5.6Mass, 1 kg. 5.7UV lamp giving UV-A (365 nm). 6 Reagents 6.1Fluorescent whitening agents (FWAS) with Constitution No.
29、 40622 in accordance with Colour Index II, 1956 Edition (The Society of Dyers grade 5 signifies good fastness. The evaluation grade of the comparison paper which is the most similar to the stained glass fibre paper is given as the evaluation grade of the tested paper. Faint fluorescence (small brigh
30、t spots) may appear at the glass fibre paper without transfer of fluorescent whitening agents. As this phenomenon may be caused by other components in the paper from the edges of the sample piece or from dust from the air, it should not be taken as bleeding of fluorescent whitening agents. Therefore
31、, fluorescence less than corresponding with grade 4 is not an indication of bleeding of fluorescent whitening agents and shall be evaluated as grade 5. If the two sides of the sample produce different results, the test report shall state to which side of the sample the data relates. NOTEIn the case
32、of paper or board that comes into contact with foodstuffs only with one side (e.g. food packaging) and it is known which side is intended to make contact with the food, only this side will be evaluated. 13 Test report The test report shall refer to this European Standard and state: a) test result; b
33、) designation of the paper or board tested, side tested if applicable; c) procedure A or B; d) test fluids and associated evaluation notes; e) date of test; f) any deviation from this European Standard. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 14:32:41 GMT+00:00 2006, Uncontrolled Copy
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