1、BSEN 12720:2009ICS 97.140NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDFurnitureAssessmentof surfaceresistancetocoldliquids+A1:2013National forewordThis British Standard is the UK implementation of EN 12720:2009+A1:2013. It supersedes BS EN 12720:2009 which is
2、 withdrawn.The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by !“.The UK participation in its preparation was entrust
3、ed by Technical Committee FW/0, Furniture, to Subcommittee FW/0/1 Common Test Methods for Furniture.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are res
4、ponsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.BS EN 12720:2009+A1:2013This British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 31 March2009 The British StandardsInstitution 2014. Publ
5、ishedby BSI Standards Limited2014Amendments/corrigenda issued since publicationDate Comments 28 February 2014 Implementation of CEN amendment A1:2013ISBN 978 0 580 82222 3EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12720:2009+A1 October 2013 ICS 97.140 English Version Furniture - Assessment
6、 of surface resistance to cold liquids Meubles - valuation de la rsistance de la surface aux liquides froids Mbel - Bewertung der Bestndigkeit von Oberflchen gegen kalte Flssigkeiten This European Standard was approved by CEN on 3 January 2009 and includes Amendment 1 approved by CEN on 3 September
7、2013. 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 obtaine
8、d on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard 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 CEN-C
9、ENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, I
10、taly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: A
11、venue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12720:2009+A1:2013: E 2 Contents Page Foreword . 3 1 Scope 4 2 Normative references . 4 3 Terms and definitions 4 4 Principle 5 5 Apparatus and m
12、aterials 5 5.1 Discs . 5 5.2 Glass Petri dish 5 5.3 Tweezers . 5 5.4 Absorbent paper or tissue . 5 5.5 Cleaning cloth 5 5.6 Diffuse light source 5 5.7 Test liquid . 5 5.8 Deionized or distilled water . 5 5.9 Cleansing solution . 5 5.10 Cleansing agent . 5 6 Preparation and conditioning 6 6.1 Conditi
13、oning . 6 6.2 Test surface 6 7 Test procedure . 6 7.1 Testing 6 7.2 Test periods 7 8 Examination of the test panel 7 9 Assessment of results . 8 10 Test report 8 Annex A (normative) Liquids for testing surface 10 A.1 General . 10 A.2 Liquids 10 Annex B (informative) Significant technical changes in
14、revised edition of this standard . 13 Bibliography 14 Tables Table 1 Test periods . 7 Table 2 Descriptive numerical rating code 8 Table A.1 Liquids 10 !deleted text“ BS EN 12720:2009+A1:2013 EN 12720:2009+A1:2013 (E)3 Foreword This document (EN 12720:2009+A1:2013) has been prepared by Technical Comm
15、ittee CEN/TC 207 “Furniture”, the secretariat of which is held by UNI. 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 April 2014, and conflicting national standards shall be withdrawn at the late
16、st by April 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document includes Amendment 1 approved by CEN on 2013-09-03. Th
17、is document supersedes !EN 12720:2009“. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. Informative !Annex B“ provides details of significant technical changes between this European Standard and the previous edition. According to the CEN/CENELEC I
18、nternal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland
19、, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 12720:2009+A1:2013 EN 12720:2009+A1:2013 (E)4 1 Scope This European standard specifies a method for the assessment of th
20、e resistance to cold liquids of all rigid furniture surfaces regardless of materials. It does not apply to leather and textile surfaces. The test is intended to be carried out on a part of the finished furniture, but can be carried out on test panels of the same material, finished in an identical ma
21、nner to the finished product, and of a size sufficient to meet the requirements of the test. The test shall be carried out on unused surfaces. The type and number of test liquids (Annex A) and the test periods (Table 1) shall be stated in requirement specifications or shall be agreed upon between pu
22、rchaser and supplier or interested parties. Annex A (normative) includes a selection of suitable test liquids. Other liquids can be used if required. !deleted text“ 2 Normative references !The following documents, in whole or in part, are normatively referenced in this document and are indispensable
23、 for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.“ EN ISO 105 E04:1996, Textiles Tests for colour fastness Part E04: Colour fastness to perspiration (ISO 105-E04:1994)
24、ISO 1065:1991, Non-ionic surface-active agents obtained from ethylene oxide and mixed non-ionic surface-active agents Determination of cloud point 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 test panel panel including the test surface NOT
25、E It may be cut from a finished item of furniture or it may be a separate panel produced in the same manner as the finished item of furniture. 3.2 test surface part of the test panel 3.3 test area part of the test surface under the glass Petri dish (5.2) BS EN 12720:2009+A1:2013 EN 12720:2009+A1:201
26、3 (E)5 4 Principle Discs saturated with the test liquids are placed on the test surface and covered by a glass Petri dish. After a specified test period, the discs are removed and the test surface is left for 16 h to 24 h. Thereafter, the test surface is cleaned and examined for damages such as disc
27、olouration, change in gloss, change in colour, blistering and swelling. The test result is stated in a numerical rating code. 5 Apparatus and materials 5.1 Discs Discs with a diameter of (25 2) mm, of soft filter paper with a grammage of 400 g/m to 500 g/m, without colouring agent and glue. 5.2 Glas
28、s Petri dish Glass Petri dish with ground edges and without lips, external diameter (40 2) mm, and height (25 2) mm. 5.3 Tweezers 5.4 Absorbent paper or tissue 5.5 Cleaning cloth White soft absorbent cloth. 5.6 Diffuse light source Light source providing evenly diffused light giving an illumination
29、on the test surface of (1200 400) lx. This may either be diffused daylight or be diffused artificial daylight. NOTE The daylight should be unaffected by surrounding trees, etc. When artificial daylight is used it is recommended that it should have a correlated colour temperature of (6500 50) K and a
30、n Ragreater than 92, by using a colour matching booth in accordance with EN ISO 3668:2001.15.7 Test liquid Examples of the test liquids are given in Annex A (normative). 5.8 Deionized or distilled water 5.9 Cleansing solution Solution containing 15 ml/l of the cleansing agent (5.10) in water (5.8).
31、The solution shall be discarded after one day. 5.10 Cleansing agent Cleansing agent of the following composition: a) 12,5% (m/m) of a sodium primary C10 to C14polymer alkyl aryl sulphonate, BS EN 12720:2009+A1:2013 EN 12720:2009+A1:2013 (E)6 b) 12,5% (m/m) polyethoxylated derivatives of primary or s
32、econdary C8 to C16alcohols with 5 to 15 ethoxylated groups having a cloud point of 25 C to 75 C in 1% (m/m) aqueous solution (determination of cloud point is described in ISO 1065:1991), c) 5,0% (m/m) ethanol, d) 70% (m/m) water (5.8). The cleansing agent shall be stored in a glass bottle in a cool
33、dark place and shall be used within one year of the day of preparation. 6 Preparation and conditioning 6.1 Conditioning Conditioning of test surface shall begin at least one week before testing and shall be carried out in air at a temperature of (23 2) C and relative humidity of (50 5) %. The condit
34、ioning time shall be stated in the test report. 6.2 Test surface The test surface shall be substantially flat and of a size sufficient to meet the requirements of Clause 7 regarding the separation of the discs (5.1). 7 Test procedure 7.1 Testing Immediately after conditioning, the test shall be carr
35、ied out in a test atmosphere of (23 2) C. The test surface shall be placed horizontally. It shall be tested with the chosen test liquids at points which shall be not less than 60 mm apart, from centre to centre, and if possible, with centres not less than 40 mm from any edge of the test surface. If
36、there is any reason to suppose that the properties of the test surface may vary, two tests shall be carried out. The test surface shall be lightly wiped with a cleaning cloth (5.5) before testing. Use clean tweezers for each type of liquid. Immerse a disc (5.1) into the test liquid (5.7) between 30
37、s and 60 s, lift with the tweezers (5.3) and quickly wipe off the edge of the disc once against the edge of the vessel. Quickly place it on the test surface and immediately cover with an inverted glass Petri dish (5.2). The filter paper shall not be in contact with the edge of the glass Petri dish.
38、Record the position of each test liquid. After the test period, remove the glass Petri dish and lift off the disc with the tweezers. Do not remove fibres of paper adhering to the test surface. Soak up any remaining test liquid with the absorbent paper (5.4) without rubbing and leave the test surface
39、 undisturbed for 16 h to 24 h in the test atmosphere without covering it. The test surface shall be sufficiently protected against dust without limiting in any way the free access of air. After the above 16 h to 24 h, wash the test surface by lightly rubbing it with the cleaning cloth (5.5) soaked f
40、irst in cleansing solution (5.9) and then only water (5.8). Finally wipe the surface lightly with a dry cleaning cloth (5.5). BS EN 12720:2009+A1:2013 EN 12720:2009+A1:2013 (E)7 Leave the test surface undisturbed, without covering it, for 30 min in the test atmosphere. 7.2 Test periods Test periods
41、shall be selected from the Table 1. The periods have been chosen to simulate the range of times that may elapse before a liquid, applied to the surface of furniture, would be removed. Table 1 Test periods Period Examples under consideration 10 s Immediate removal 2 min Quick removal 10 min After a s
42、hort time 1 h After a meal or similar 6 h After work or other activity 16 h As soon as possible next day 24 h After one day 7 days After one week 28 days Long-term action 8 Examination of the test panel Carefully examine the test surface using the light source (5.6), for changes caused by the test l
43、iquids, e. g. discoloration, change in gloss and colour, blistering, swelling and other defects. For this purpose illuminate the surface separately and examine from different angles, directions and planes, including angle combinations such that the light is reflected from the test surface and toward
44、s the observers eye. The viewing distance shall be 0,25 m to 1,0 m. Changes caused by the test liquids shall also be determined by touching the surface. BS EN 12720:2009+A1:2013 EN 12720:2009+A1:2013 (E)8 9 Assessment of results Rate the test surfaces by comparing the test area with the area surroun
45、ding it for each liquid according to Table 2: Table 2 Descriptive numerical rating code Numerical rating Description 5 No change test area indistinguishable from adjacent surrounding area 4 Minor change test area distinguishable from adjacent surrounding area, only when the light source is mirrored
46、on the test surface and is reflected towards the observers eye, e. g. discoloration, change in gloss and colour no change in the surface structure, e.g. swelling, fibre raising, cracking, blistering 3 Moderate change test area distinguishable from adjacent surrounding area, visible in several viewin
47、g directions, e. g. discoloration, change in gloss and colour no change in the surface structure, e.g. swelling, fibre raising, cracking, blistering 2 Significant change test area clearly distinguishable from adjacent surrounding area, visible in all viewing directions, e. g. discoloration, change i
48、n gloss and colour, and / or structure of the surface slightly changed, e.g. swelling, fibre raising, cracking, blistering 1Strong change the structure of the surface being distinctly changed and / or discoloration, change in gloss and colour, and / or the surface material being totally or partially
49、 removed, and / or the filter paper adhering to the surface Each test surface shall be rated by an experienced observer. In cases of doubt, three observers shall be required. All observers shall have good colour vision. In case of three observers, the reported rating for the test surface shall be the average to the nearest nominal value. Duplicate tests shall be assessed and reported separately. 10 Test report The test report shall include at least the following information: a) reference to this European Standard; b) descrip
