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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 646:2001 The Europe
2、an Standard EN 646:2000 has the status of a British Standard ICS 67.250; 85.060 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Paper and board intended to come into contact with foodstuffs Determination of colour fastness of dyed paper and board Licensed Copy: sheffieldun she
3、ffieldun, na, Mon Nov 13 14:29:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Consumer Products and Services Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 January 2001 B
4、SI 01-2001 ISBN 0 580 36846 7 BS EN 646:2001 Amendments issued since publication Amd. No.DateComments National foreword This British Standard is the official English language version of EN 646:2000. It supersedes BS EN 646:1994 which is withdrawn. The UK participation in its preparation was entruste
5、d by Technical Committee CW/47, Materials in contact with food, to Subcommittee CW/47/3, Paper and board in contact with foodstuffs, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals
6、for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement internat
7、ional or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all
8、 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, the EN title
9、 page, pages 2 to 5 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 14:29:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 646 S
10、eptember 2000 ICS 67.250; 85.060Supersedes EN 646:1993 English version Paper and board intended to come into contact with foodstuffs - Determination of colour fastness of dyed paper and board Papiers et cartons destins entrer en contact avec les denres alimentaires - Dtermination de la solidit de la
11、 couleur des papiers et cartons colors Papier und Pappe vorgesehen fr den Kontakt mit Lebensmitteln - Bestimmung der Farbechtheit von gefrbtem Papier und Pappe This European Standard was approved by CEN on 9 September 2000. CEN members are bound to comply with the CEN/CENELEC Internal Regulations wh
12、ich 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 St
13、andard 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 st
14、andards 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 COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE
15、FR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels 2000 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 646:2000 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 14:29:15 GMT+00:00 2006, Uncontrolled Copy, (
16、c) BSI Page 2 EN 646:2000 BSI 01-2001 Contents Page Foreword . 3 1Scope 3 2Normative references 3 3Terms and definitions 3 4Principle .3 5Materials and equipment 4 6Reagents4 7Sampling 4 8Preparation of sample 4 9Procedure A (long duration contact).4 10Procedure B (short time contact) .5 11Evaluatio
17、n 5 12Report 5 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 14:29:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 646:2000 BSI 01-2001 Foreword This European Standard has been prepared by Technical Committee CEN/TC 172, Pulp, paper and board, the Secretariat of which is held by DIN
18、. 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 March 2001, and conflicting national standards shall be withdrawn at the latest by March 2001. This European Standard supersedes EN 646:1993. With
19、 regard to EN 646:1993 the following changes have been made: a) possibility to use iso-octane instead of olive oil and the responsibility of a “yes/no” determination were added; b) editorial changes. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the follo
20、wing 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. 1 Scope This European Standard describes p
21、rocedures for the testing of dyed paper and board intended to come into contact with foodstuffs. 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). Visual evaluation
22、against a blank is used only in order to detect any bleeding (yes/no) while evaluation against a grey scale provides grading of the bleeding. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are ci
23、ted 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 or revision. For undated references the latest editi
24、on of the publication referred to applies (including amendments). EN ISO 186 Paper and board Sampling to determine average quality (ISO 186:1994) EN 20105 A03 Textiles-tests for colour fastness Part A03: Grey scale for assessing staining (ISO 105 A03:1993) ISO 8787 Paper and board Determination of c
25、apillary rise Klemm method 3 Terms and definitions For the purposes of this standard the following terms and definitions apply: 3.1 colour fastness: the lack of transfer of colour from a paper to a non stained glass-fibre paper, saturated with a test fluid and evaluated visually for staining against
26、 a grey scale or a blank. 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 evaluated with the grey scale. The staining of the glass fibre paper is evaluate
27、d against a blank or grey scale. The test fluids used are water, dilute acetic acid, sodium carbonate solution and olive oil depending on the type of contact expected. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 14:29:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 646:2000 BSI 01
28、-2001 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 70 g/m; b) capillary rise of 190 mm to 210 mm in 10 min in accordance with ISO 8787; c) free from fluorescent whitened and wetstrength agents; d) f
29、ree from cellulosic fibres. 5.2 Glass plates, 60 mm 90 mm. 5.3 Polyethylene film, uncoloured and transparent. 5.4 Mass, 1 kg. 5.5 Grey scale in accordance with EN 20105 A03. This is only needed when grading is required. 6 Reagents 6.1 Distilled or deionized water 6.2 Aqueous acetic acid 3,0 % (m/v)
30、6.3 Sodium carbonate solution 5 g/l 6.4 Iso-octane (2,2,4-trimethylpentan) 6.5 Rectified olive oil, characterized as follows: iodine value (Wijs)80 to 88; refractive index at 25 C1,466 5 to 1,467 9; acidity (expressed as % oleic acid)max. 0,5 %; peroxide number (expressed as oxygen milli-equivalents
31、 per kg oil)max. 10. 7 Sampling If a lot is tested then sampling is carried out in accordance with EN ISO 186. 8 Preparation of sample Cut or punch several test pieces of 50 mm 20 mm from the sample under investigation. Smooth edges shall be obtained. 9 Procedure A (long duration contact) 9.1 Immers
32、e two sheets of glass fibre paper (5.1) in a test fluid (6.1, 6.2, 6.3, 6.4 or 6.5). Remove the sheets after saturation and free the sheets from excess fluid by wiping on the rim of the container. 9.2 Place one sheet of glass fibre paper with its smooth side upwards on the glass plate (5.2). Place t
33、he test piece (8) immediately on the glass fibre paper. Cover it with the second saturated sheet of glass fibre paper, so that the smooth side of the glass fibre paper is in contact with the test piece again. Place a second glass plate (5.2) on top of the second glass fibre paper and wrap the total
34、assembly in polyethylene film (5.3) to prevent the edges from drying out. Load it with a mass of 1 kg (5.4) and allow it to stand for 24 h at (23 2) C with protection against direct light penetration. 9.3 If test pieces of a grammage 140 g/m are to be investigated, an appropriate even number of glas
35、s fibre paper layers (5.1) is used so that the total of their grammages just exceeds the grammage of the test piece. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 14:29:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN 646:2000 BSI 01-2001 Construct the assembly as described in 9.2, w
36、ith each glass fibre paper being individually saturated and wiped, and arranged in such a way that the same number of glass fibre papers are in contact with both sides of the test piece. 9.4 After 24 h, open the assembly. Lay the glass fibre papers on three adjacent glass rods, 8 mm to 10 mm, with t
37、he side which was in contact with the test piece upwards. Cover them without contact to prevent light penetration and air-dry at ambient temperature. Glass fibre papers saturated with olive oil are not dried. 10 Procedure B (short time contact) 10.1 Immerse two sheets of glass fibre paper (5.1) in a
38、 test fluid (6.1, 6.2, 6.3, 6.4 or 6.5). Remove the sheets after saturation and free the sheets from excess fluid by wiping on the rim of the container. 10.2 Place one sheet of glass fibre paper with its smooth side upwards on the glass plate (5.2). Place the test piece (8) immediately on the glass
39、fibre paper. Cover it with the second saturated sheet of glass fibre paper, so that the smooth side of the glass fibre paper is in contact with the test piece again. Place a second glass plate (5.2) on top of the second glass fibre paper and wrap the total assembly in polyethylene film (5.3) to prev
40、ent the edges from drying out. Load it with a mass of 1 kg (5.4) and allow it to stand for 10 min at (23 2) C with protection against direct light penetration. 10.3 After 10 min open the assembly. Place the glass fibre papers on three adjacent glass rods, 8 mm to 10 mm, with the side which was in co
41、ntact with the test piece upwards, cover them without contact to prevent light penetration and air-dry at ambient temperature. Glass fibre papers saturated with olive oil are not dried. 11 Evaluation Evaluate the staining of the glass fibre papers on the side with which they were in contact with the
42、 sample, using a blank or the grey scale (5.5). If grading is required use the grey scale in accordance to EN 20105 A03. When several layers of glass fibre papers are used, evaluate only the layer that was in contact with the test piece. If the two sides of the sample produce different results, the
43、test report shall state to which side of the sample the data relates. If the evaluation is done against a blank in order to detect any bleeding, the result is given as “yes” or “no”. If a grading is provided a distinction is drawn between five different evaluation grades: Grade 1 signifies poor fast
44、ness; Grade 5 signifies good fastness. The grade of the grey scale which is the most similar to the stained glass fibre paper is given as the evaluation grade of the tested paper. NOTE 1: In the case that paper or board will come into contact with foodstuffs only with one side (e.g. foodpackaging) a
45、nd it is known which side is facing the food, only this side will be evaluated. NOTE 2: As iso-octane is more severe than olive oil it is possible to show compliance using olive oil, if the test fails with iso-octane. 12 Report The test report shall refer to this European Standard and state: a) test
46、 result; b) designation of the paper or board and identification of the sample tested; side tested if applicable; c) Procedure A or B; evaluation yes/no or grading; d) test fluids and associated evaluation notes; e) date of test; f) any deviation from this European Standard. Licensed Copy: sheffield
47、un sheffieldun, na, Mon Nov 13 14:29:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 646:2001 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
48、 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorp
49、orated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: 020 8996 9000. Fa