1、BRITISH STANDARDBS EN 12875-5:2006Mechanical dishwashing resistance of utensils Part 5: Rapid test for ceramic catering articlesThe European Standard EN 12875-5:2006 has the status of a British StandardICS 67.250; 97.040.40; 97.040.60g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g
2、51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 12875-5:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2006 BSI ISBN 0 580 48035 6Nation
3、al forewordThis British Standard is the official English language version of EN 12875-5:2006.The UK participation in its preparation was entrusted to Technical Committee CW/29, Tableware, which has the responsibility to: A list of organizations represented on this committee can be obtained on reques
4、t to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Elect
5、ronic 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 with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to un
6、derstand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a
7、 front cover, an inside front cover, the EN title page, pages 2 to 7 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 12875-5Marc
8、h 2006ICS 67.250; 97.040.40; 97.040.60English VersionMechanical dishwashing resistance of utensils - Part 5: Rapidtest for ceramic catering articlesRsistance mcanique au lave-vaisselle des ustensiles -Partie 5: Essai acclr pour les articles en cramique pourcollectivitsSplmaschinenbestndigkeit von Ge
9、genstnden - Teil 5:Schnellverfahren fr keramische Gegenstnde fr dengewerblichen GebrauchThis European Standard was approved by CEN on 13 February 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status
10、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 any CEN member.This European Standard exists in three official versions (English, French, German). A versio
11、n 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 members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, F
12、inland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOM
13、ITEE 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 12875-5:2006: EEN 12875-5:2006 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references
14、5 3 Principle5 4 Reagents.5 5 Apparatus .5 6 Test specimens6 7 Procedure .6 8 Test report 7 EN 12875-5:2006 (E) 3 Foreword This document (EN 12875-5:2006) has been prepared by Technical Committee CEN/TC 194 “Utensils in contact with food”, the secretariat of which is held by BSI. This European Stand
15、ard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2006, and conflicting national standards shall be withdrawn at the latest by September 2006. According to the CEN/CENELEC Internal Regulations, the national
16、standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portuga
17、l, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 12875-5:2006 (E) 4 Introduction This European Standard specifies an accelerated test for the determination of the dishwashing resistance of catering articles made of ceramics. Further parts of EN 12875, under the gener
18、al title Mechanical dishwashing resistance of utensils that have already been published or are in preparation are as follows: Part 1: Reference test method for domestic articles Part 2: Inspection of non-metallic articles Part 4: Rapid test for domestic ceramic articles Part 5: Rapid test for cerami
19、c catering articles The accelerated test is a useful method for predicting the dishwashing resistance of the glaze surface of ceramic products intended for catering use. The catering industry requires significant quantities of products that are decorated on the glaze surface (for example customized
20、or bespoke ware), and such ware may have an overall durability which is lower than that of the glaze surface itself. A convenient method to test on-glaze decorated ware is referred to in the Note to 4.2; however, testing by this modified procedure will not be in accordance with EN 12875-5. Note that
21、 the reference test method (EN 12875-1) is based on a multi-cyclic test in a modified domestic dishwashing machine, and utilizes an alkaline domestic dishwashing detergent. It is intended that the inspection procedure given in EN 12875-2 be used to examine ceramic catering articles which have been s
22、ubjected to the rapid test. EN 12875-5:2006 (E) 5 1 Scope This European Standard specifies a rapid method for testing the dishwashing resistance of catering articles made of ceramics. It does not define the number of dishwashing cycles that any given product should withstand. The method tests the di
23、shwashing durability of the glaze surface of the ceramic articles. 2 Normative references The following referenced documents are indispensable for the application of this European standard. For dated references, only the edition cited applies. For undated references, the latest edition of the refere
24、nced document (including any amendments) applies. EN 12875-2:2001, Mechanical dishwashing resistance of utensils Part 2: Inspection of non-metallic articles EN ISO 3696:1995, Water for analytical laboratory use - Specification and test methods (ISO 3696:1987) 3 Principle Unused specimens of ware are
25、 immersed in a static solution of a specified alkaline dishwashing detergent at (75 1) C for a total of 16 hours. The specimens are then examined visually and compared with similar, untested pieces to determine any changes in gloss or colour resulting from detergent attack. 4 Reagents 4.1 Detergent
26、formulation For the purposes of this test, a liquid detergent having the following chemical composition shall be used: Technical grade sodium hydroxide 15 % w/w Nitrilotriacetic acid, trisodium salt 16 % w/w Water (grade 3 as specified in EN ISO 3696:1995) 69 % w/w 4.2 Detergent solution 2,0 % (w/w)
27、 aqueous solution of detergent (4.1) prepared with distilled water or water of equivalent purity (grade 3 water as specified in EN ISO 3696:1995). NOTE Testing in a 0,3% (w/w) solution of the detergent may provide useful information on the performance of catering ware for special applications, for e
28、xample on-glaze decorated ware (including gold decoration). However, testing using the 0,3% detergent solution will not be in accordance with EN 12875-5. Sufficient detergent solution is required to ensure that the total ware surface area to test solution volume does not exceed 130 cm2/l. 5 Apparatu
29、s 5.1 Stainless steel tank with a close-fitting stainless steel lid, capable of holding at least 10 litres of detergent solution. EN 12875-5:2006 (E) 6 5.2 Stainless steel rack to support the test specimens and to separate individual items from the bottom of the tank and from each other, allowing fr
30、ee access for the detergent solution. NOTE Certain materials will inhibit the attack of an alkaline washing agent on ceramic articles. These include aluminium and zinc, and any contact with this type of material should be avoided. 5.3 Hot water bath surrounding the stainless steel tank and capable o
31、f maintaining the solution temperature within the test tank at (75 1) C, and fitted with: a) a circulating pump to maintain an even temperature distribution throughout the test tank; b) a temperature monitoring device that records any deviation in the temperature of the solution in the tank during t
32、he immersion period. NOTE The bath may be large enough to contain several tanks. 5.4 Inspection site, as specified in EN 12875-2. 5.5 Precision ruler (engineering grade), graduated in millimetres. 5.6 Thermometer, covering the range 50 C to 90 C in 0,2 C graduations. 6 Test specimens A test specimen
33、 shall be any item of ceramic ware that can be completely immersed in the detergent solution. A minimum of four identical pieces of ware shall be available for test. 7 Procedure 7.1 Preparation of test specimens 7.1.1 Remove any surface contamination from the test specimens, e.g. by washing the spec
34、imens by hand in a mild liquid detergent at about 45 C, followed by rinsing and drying with a clean cloth. 7.1.2 Place the test specimens in the inspection site and examine them with normal corrected vision from a distance of (30 10) cm, while the viewing angle is changed. All test specimens of a gi
35、ven type shall be of comparable quality in gloss and colour; discard any specimens that are of inferior quality. Retain one specimen as an untested reference standard. 7.2 Immersion of test specimens 7.2.1 Determine the surface area of the test specimens. Fill the tank with sufficient water (see 4.2
36、) to completely cover the specimens. Check for compliance with the surface area to volume criterion given in 4.2; if the calculated surface area approaches the critical limit of 130 cm2/l, a greater volume shall be used. NOTE When determining the surface area of flatware, it is sufficient to determi
37、ne the surface area of a flat disc having the same circumference as the ware. For other types of ware allowance should be made for curvature and for handles, etc. 7.2.2 Cover the tank and adjust the water bath temperature to give a test tank temperature of (75 1) C. Record the tank temperature. 7.2.
38、3 Add sufficient detergent to give a solution of the correct concentration (see 4.2) in the test tank. Stir well to disperse the detergent. Immediately lower the test specimens, in the racks, into the tank and cover with the lid. EN 12875-5:2006 (E) 7 7.2.4 After 16h 10 min, record the temperature i
39、n the tank and remove the test specimens. Rinse the test specimens in hot water and rub dry with a clean cloth. NOTE Variations of 10 minutes on the immersion time have no detectable effect on the result obtained. The immersion time can be measured with any reliable timepiece. 7.3 Inspection after t
40、esting Examine the specimens as described in 7.1.2, comparing tested items with the corresponding untested reference standards and reporting any changes in gloss or colour using the procedure described in EN 12875-2. NOTE Detection of loss of gloss from glazed surfaces may be aided by the applicatio
41、n of a staining agent. 8 Test report The test report shall contain: a) reference to this European Standard, i.e. EN 12875-5:2006; b) identification of the articles tested, i.e. origin and designation of the manufacturer or supplier of the specimens; c) description of the articles, e.g. glost ware or
42、 under-glaze decorated, on-glaze decorated or gold decorated ware; d) place and date of sampling; e) date of receipt and date of testing of the specimens; f) number of each type of test specimen; g) category of articles according to Table 1 of EN 12875-2:2001; h) concentration of detergent solution
43、used in the test; i) average evaluation figures of all inspectors according to Table 2 of EN 12875-2:2001; j) any unusual features noted during the inspections. BS EN 12875-5:2006BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible fo
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