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1、BRITISH STANDARDBS EN12875-5:2006Mechanical dishwashing resistance of utensils Part 5: Rapid test for ceramic catering articlesThe European Standard EN 12875-5:2006 has the status of aBritish StandardICS 67.250; 97.040.40; 97.040.60 BS EN 12875-5:2006National forewordThis British Standard is the off
2、icial English language version ofEN 12875-5:2006.The UK participation in its preparation was entrusted to Technical CommitteeCW/29, Tableware, which has the responsibility to:aid enquirers to understand the text;present to the responsible international/European committee any enquiries on the interpr
3、etation, or proposals for change, and keep UK interests informed;monitor related international and European developments and promulgate them in the UK.A list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which impleme
4、nt 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 Electronic Catalogue or of British Standards Online.This publication does n
5、ot 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.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title
6、page, pages 2 to 7 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amd. No.DateCommentsThis British Standard was published under the authority of the Standards Policy and Strategy Committeeon 31 March 2006 BSIISBN 0 580 48035 6Amendmen
7、ts issued since publicationEUROPEAN STANDARD NORME EUROPENNEEUROPISCHE NORMEN 12875-5March 2006ICS 67.250; 97.040.40; 97.040.60English VersionMechanical dishwashing resistance of utensils - Part 5: Rapid test for ceramic catering articlesRsistance mcanique au lave-vaisselle des ustensiles - Partie 5
8、: Essai acclr pour les articles en cramique pour collectivitsSplmaschinenbestndigkeit von Gegenstnden - Teil 5: Schnellverfahren fr keramische Gegenstnde fr den gewerblichen GebrauchThis European Standard was approved by CEN on 13 February 2006.CEN members are bound to comply with the CEN/CENELEC In
9、ternal 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 obtained on application to the Central Secretariat or to any CEN mem
10、ber.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 Central Secretariat has the same status as the official versions.CEN members
11、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, Switzerland an
12、d United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATION C OM I T EUR OP EN DE NOR M AL I S ATI ON EUR OP I S C HES KOM I TEE F R NOR M UNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Member
13、s.Ref. No. EN 12875-5:2006: EEN 12875-5:2006 (E)ContentsPageForeword.3Introduction .41Scope .52Normative references .53Principle .54Reagents .55Apparatus .56Test specimens .67Procedure .68Test report .77ForewordThis document (EN 12875-5:2006) has been prepared by Technical Committee CEN/TC 194 “Uten
14、sils in contact with food”, the secretariat of which is held by BSI.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 2006, and conflicting national standards shall be withdrawn at the lat
15、est by September 2006.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 Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Irel
16、and, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.IntroductionThis European Standard specifies an accelerated test for the determination of the dishwashing resistance of catering article
17、s made of ceramics.Further parts of EN 12875, under the general 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 articlesPart 2: Inspection of non-metallic articlesPart 4: Rapid test f
18、or domestic ceramic articlesPart 5: Rapid test for ceramic catering articlesThe 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
19、 decorated on the glaze surface (for example customized 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 proced
20、ure will not be in accordance with EN 12875-5.Note that 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
21、to examine ceramic catering articles which have been subjected to the rapid test.1ScopeThis 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 withs
22、tand. The method tests the dishwashing durability of the glaze surface of the ceramic articles.2Normative referencesThe following referenced documents are indispensable for the application of this European standard. For dated references, only the edition cited applies. For undated references, the la
23、test edition of the referenced document (including any amendments) applies.EN 12875-2:2001, Mechanical dishwashing resistance of utensils Part 2: Inspection of non-metallic articlesEN ISO 3696:1995, Water for analytical laboratory use - Specification and test methods (ISO 3696:1987)3PrincipleUnused
24、specimens of ware are 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.4Reag
25、ents4.1Detergent formulationFor the purposes of this test, a liquid detergent having the following chemical composition shall be used: Technical grade sodium hydroxide15 % w/wNitrilotriacetic acid, trisodium salt16 % w/wWater (grade 3 as specified in EN ISO 3696:1995)69 % w/w4.2Detergent solution2,0
26、 % (w/w) 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).NOTETesting in a 0,3% (w/w) solution of the detergent may provide useful information on the performance of catering ware for special applications,
27、for example 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.5Appara
28、tus5.1Stainless steel tank with a close-fitting stainless steel lid, capable of holding at least 10 litres of detergent solution.5.2Stainless steel rack to support the test specimens and to separate individual items from the bottom of the tank and from each other, allowing free access for the deterg
29、ent solution.NOTECertain 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.5.3Hot water bath surrounding the stainless steel tank and capable of maintaining the solution t
30、emperature 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 the immersion period.NOTEThe ba
31、th may be large enough to contain several tanks.5.4Inspection site, as specified in EN 12875-2.5.5Precision ruler (engineering grade), graduated in millimetres.5.6Thermometer, covering the range 50 C to 90 C in 0,2 C graduations.6Test specimensA test specimen shall be any item of ceramic ware that c
32、an be completely immersed in the detergent solution. A minimum of four identical pieces of ware shall be available for test.7Procedure7.1Preparation of test specimens7.1.1Remove any surface contamination from the test specimens, e.g. by washing the specimens by hand in a mild liquid detergent at abo
33、ut 45 C, followed by rinsing and drying with a clean cloth.7.1.2Place 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 given type shall be of comparable quality in gloss
34、and colour; discard any specimens that are of inferior quality. Retain one specimen as an untested reference standard.7.2Immersion of test specimens7.2.1Determine the surface area of the test specimens. Fill the tank with sufficient water (see 4.2) to completely cover the specimens. Check for compli
35、ance 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.NOTEWhen determining the surface area of flatware, it is sufficient to determine the surface area of a flat disc having the same circ
36、umference as the ware. For other types of ware allowance should be made for curvature and for handles, etc.7.2.2Cover the tank and adjust the water bath temperature to give a test tank temperature of (75 1) C. Record the tank temperature.7.2.3Add sufficient detergent to give a solution of the correc
37、t 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.7.2.4After 16h 10 min, record the temperature in the tank and remove the test specimens. Rinse the test specimens in hot water and
38、 rub dry with a clean cloth.NOTEVariations 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.7.3Inspection after testingExamine the specimens as described in 7.1.2, comparing tested items with the corr
39、esponding untested reference standards and reporting any changes in gloss or colour using the procedure described in EN 12875-2.NOTEDetection of loss of gloss from glazed surfaces may be aided by the application of a staining agent.8Test reportThe test report shall contain:a) reference to this Europ
40、ean 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 under-glaze decorated, on-glaze decorated or gold decorated ware;d) place and date of sampling;
41、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 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 EN12875-5:2006
