workshop on laying down rules on nominal quantities for prepacked products. organised of european...
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Workshop on laying down rules on nominal quantities for
prepacked products.
Organised of European Commission –TAIEX – In co-operation with Serbian
Chamber of CommerceJune 7. 2010.
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Aim of the meeting
• The aim of this event is to introduce the responsibilities of the industries/prepackers regarding the Directives 2007/45/EC & 76/211/EEC.
• At the same time will be introduced the responsibilities of the individual Member State – at the same time covering responsibilities to those countries having actual agreements with EC.
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Packers and importers obligations to comply with Directice 76/211/EEC and
Directive 2007/45/EC• Technical characteristics for putting the e-mark
on the prepacked products and metrological preconditions for quantities of prepacked products.
• Acceptable variations in quantities marked on the prepackage (practical examples).
• Prepacked products control charts (negative variations in quantity, maximum allowed percentage of variations in prepackages – based on the actual nomimal content)
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Packers and importers obligations to comply with the Directive 76/211/EEC and
Directive 2007/45/EC
• The Directives are voluntary – so no producers of prepackages are forced to comply with the Directives and to use the e-mark .
• Packers and importers, who want to use the e-mark, must comply with the actual mentioned directives.
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Technical characteristics for putting the e-mark on prepacked products
• ”The three rules for prepacked products”:• The actual contents shall not be less, on average, than
the nominal quantity.• The proportion of prepackages having a negative error
greater than the tolerable negative error laid down in 2.4, Annex I (the tabel) shall be sufficiently small for batches of prepackages to satisfy the requirements of the tests specified in Annex II.
• No prepackage having a negative error greater than twice the tolerable negative error given in the table in 2.4, Annex I may bear the e-mark as referred to in 3.3, Annex I.
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Technical characteristics for putting the e-mark on prepacked products.
• The prepacked products (with constant nominal quantities) – intended for sale - which can bear the e-mark, are limited to:
• 1) Equal to values predetermined by the packer. • 2) expressed in units of weight or volume.• 3) Not less than 5 g or 5 ml and not more than 10 kg or
10 l.
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Technical characteristics for putting the e-mark on the prepacked products.
• According to the statistical tests mentioned as the reference method in the Directives (or if another method giving the same quarantees is chosen), it is assumed the data achieved - doing the samling and measurements nescessary – are forming a socalled normal or log normal distribution.
• Can be checked either through graphically presentation or by performing supplemantary stastitical tests – for instans by using the socalled chi square test.
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Technical characteristics for putting the e-mark on the prepacked products
• Criteria for acceptance or rejection of results after performing the tests mentioned as the reference method:
• By using non-destructive testing:
• Number in batch Number in sample Acceptance Rejection
100 to 500 (inclusive) 30ӯ ≥ Qn-0.503s ӯ < Qn-0.503s
˃ 500 50ӯ ≥ Qn-0.379s ӯ < Qn-0.379s
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• Technical characteristics for putting the e-mark on the prepackaged products –
• Criteria for destructive testing
Number in batch Number in sample Acceptance Rejection
≥ 100 20ӯ ≥ Qn-0.640s ӯ < Qn-0.640s
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Technical characteristics for putting the e-mark on the prepacked products
• Prepackages which may bear the e-sign are those which comply with the actual directives (76/211/EEC and 2007/45/EC).
• They shall be subject to metrological control under the conditions defined in Annex I, section 5 and in Annex II.
• Annex I, section 5: checks have to be carried out by the competent department on the premises of the packer or of the importer - or of his agent established in the community.
• Checks have to be carried out by sampling.
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Responsibilities of the packer or of the importer
• Responsible to ensure, that their prepakages are meeting the requirements.
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Responsibilities of the Member State
• The individual Member State has the responsibility to ensure, that producers and importers of prepacked products (e-marked) in their country are meeting the requirements.
• Checks to be carried out must be based on legal measuring instruments.
• The check may be carried out by sampling. In the case of imports from non-EC countries the importer may instead of measuring and checking provide evidence, that he is in possession of all the nescessary guaranties enabling him to assume responsibility.
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Example showing the result of performance of reference test
• Results from weighing on typeapproved and verified weight.
• 30 prepackages (g):• 985,0 – 1009,0 – 986,0 – 976,0 – 988,0 -
1010,0 – 985,0 – 990,0 – 1002,0 – 986,0 -1012,0 – 985,0 – 987,0 – 993,0 – 1024,0 -998,0 – 985,0 – 1008,0 – 1015,0 – 989,0 -1002,0 – 986,0 – 995,0 – 988,0 – 987,0 -1010,0 – 985,0 – 990,0 – 988,0 – 986,0
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Example showing the result from performing the reference test.
• The nominal value on the prepackage was = 1000 g• The average in the prepackages is = ӯ = 994.33• The standard deviation is = s = 11.73• Using the rejection criteria - if ӯ < 1000 (Qn) – 5.90
(0.503s = 0.503 x 11.73 = 5.90) = 994.1 - then the batch should be rejected.
• As the average value of the 30 samples is higher (or the same) as the calculated rejection value, the batch was approved.
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Chi-square test
• Because of the achieved results from the performance of the reference test, the data distribution was controlled using the socalled chi-square-test and graphical evaluation.
• The result of the performance of the chi-square-test was, that the results did not actually form a normal (Gauss) distribution.
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Graphical presentation of the weighing results in selected groups
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