1、BRITISH STANDARDBS EN 648:2006Paper and board intended to come into contact with foodstuffs Determination of the fastness of fluorescent whitened paper and boardThe European Standard EN 648:2006 has the status of a British StandardICS 67.250; 85.060g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g5
2、5g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Fri May 25 06:22:07 GMT+00:00 2007, Uncontrolled Copy, (c) BSIBS EN 648:2006This British Standard was published under the
3、authority of the Standards Policy and Strategy Committee on 30 March 2007 BSI 2007ISBN 978 0 580 50419 8National forewordThis British Standard was published by BSI. It is the UK implementation of EN 648:2006. It supersedes BS EN 648:2003 which is withdrawn. The UK participation in its preparation wa
4、s entrusted to Technical Committee PAI/11, Methods of test for paper, board and pulps.A list of organizations represented on PAI/11 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its corre
5、ct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsLicensed Copy: Wang Bin, na, Fri May 25 06:22:07 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 648Sep
6、tember 2006ICS 67.250; 85.060 Supersedes EN 648:2003 English VersionPaper and board intended to come into contact with foodstuffs -Determination of the fastness of fluorescent whitened paper andboardPapier et carton destins entrer en contact avec lesdenres alimentaires - Dtermination de la solidit d
7、upapier et du carton blanchis par des agents dazuragefluorescentsPapier und Pappe vorgesehen fr den Kontakt mitLebensmitteln - Bestimmung der Farbechtheit von optischaufgehelltem Papier und PappeThis European Standard was approved by CEN on 24 August 2006.CEN members are bound to comply with the CEN
8、/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to an
9、y CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN m
10、embers are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerla
11、nd and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 648:2
12、006: ELicensed Copy: Wang Bin, na, Fri May 25 06:22:07 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 648:2006 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Principle4 5 Materials and equipment.4 6 Reagents.5 7 Sampling.6 8 Preparation of sample .6 9 Pro
13、cedure A (long duration contact) .6 10 Procedure B (short time contact).6 11 Comparison papers .7 11.1 Solutions for comparison papers 7 11.2 Preparation of fluorescent whitened comparison papers.7 12 Evaluation.8 13 Test report 8 Licensed Copy: Wang Bin, na, Fri May 25 06:22:07 GMT+00:00 2007, Unco
14、ntrolled Copy, (c) BSIEN 648:2006 (E) 3 Foreword This document (EN 648:2006) has been prepared by Technical Committee 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 iden
15、tical text or by endorsement, at the latest by March 2007, and conflicting national standards shall be withdrawn at the latest by March 2007. This document supersedes EN 648:2003. With regard to EN 648:2003 the following changes has been made: a) the test fluid “sodium carbonate solution“ has been o
16、mitted and the test fluid “saliva stimulant“ has been introduced to cover a demand b) editorial changes According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Re
17、public, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: Wang Bin, na, Fri May 25 06:22:07 GMT+
18、00:00 2007, Uncontrolled Copy, (c) BSIEN 648:2006 (E) 4 1 Scope This document specifies procedures for the testing of the fastness of fluorescent whitened paper and board intended to come into contact with foodstuffs. Two procedures are given, procedure A for contact of long duration (e. g. food pac
19、kaging) and procedure B, for contact of short duration (e. g. napkins, kitchen papers, household papers). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, th
20、e latest edition of the referenced document (including any amendments) applies. 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 the purposes of this document, the follo
21、wing term and definition applies. 3.1 fastness ineffective transfer of fluorescent whitening agent from paper, to a glass fibre paper saturated with a test fluid and evaluated visually under UV-light against a series of comparison papers 4 Principle A sample is brought into contact with glass fibre
22、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 evaluated by comparison with a series of fluorescent whitened comparison papers. The test fluids used are distilled or deionised water, dilute acetic acid, saliva simul
23、ant and olive oil depending on the type of food contact expected. 5 Materials and equipment 5.1 Unstained glass fibre papers of 60 mm 90 mm. The glass fibre papers shall meet the following conditions: a) grammage of 70 g/m; b) capillary rise of 190 mm to 210 mm in 10 min in accordance with ISO 8787;
24、 c) free from fluorescent whitening and wet strength agents; d) free from cellulosic fibres. 5.2 Glass fibre papers with a diameter of 30 mm. The glass fibre papers shall meet the same conditions as in 5.1. 5.3 Watch glass dish with a diameter of 40 mm. 5.4 Glass plates, 60 mm 90 mm. Licensed Copy:
25、Wang Bin, na, Fri May 25 06:22:07 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 648:2006 (E) 5 5.5 Polyethylene film, uncoloured and transparent. 5.6 Weight having a mass of 1 kg. 5.7 UV lamp giving UV-A (365 nm). 6 Reagents 6.1 Fluorescent whitening agents (FWAs) with Constitution No. 40622 in accor
26、dance 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 bright spots) may ap
27、pear 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, fluorescence
28、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. NOTE In the case of paper or bo
29、ard 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 include the following information: a) reference to this European Standard
30、 b) test result; c) designation of the paper or board tested, side tested if applicable; d) procedure A or B; e) test fluids and associated evaluation notes; f) date of test; g) any deviation from this European Standard. Licensed Copy: Wang Bin, na, Fri May 25 06:22:07 GMT+00:00 2007, Uncontrolled
31、Copy, (c) BSIblankLicensed Copy: Wang Bin, na, Fri May 25 06:22:07 GMT+00:00 2007, Uncontrolled Copy, (c) BSIBS EN 648:2006BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents the UK view o
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