1、June 2015 Translation by DIN-Sprachendienst.English price group 8No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 65
2、.160!%C;r“2322479www.din.deDDIN ISO 20193Tobacco and tobacco products Determination of the width of the strands of cut tobacco(ISO 20193:2012),English translation of DIN ISO 20193:2015-06Tabak und Tabakerzeugnisse Bestimmung der Fadenbreite von Schnitttabak (ISO 20193:2012),Englische bersetzung von
3、DIN ISO 20193:2015-06Tabac et produits du tabac Dtermination de la largeur des brins de tabac hach (ISO 20193:2012),Traduction anglaise de DIN ISO 20193:2015-06SupersedesDIN 10375:2003-10www.beuth.deDocument comprises 11 pagesIn case of doubt, the German-language original shall be considered authori
4、tative.05.15A comma is used as the decimal marker. Contents PageNational Foreword 31 Scope . 52 Normative references 53 Terms and definitions . 54 Principle 55 Apparatus . 66 Procedure. 66.1 General .66.2 Sampling .66.3 Preparation of the samples 66.4 Preparation of the strands 66.5 Determination of
5、 cut width 67 Expression of results 78 Precision . 79 Test report . 7Annex A (informative) Example of a sample holder 9Annex B (informative) Example of a data sheet 10Bibliography . 11National Annex NA (informative) Bibliography. 42DIN ISO 20193:2015-06 National foreword This standard (ISO 20193:201
6、2) has been prepared by Technical Committee ISO/TC 126 “Tobacco and tobacco products”. The responsible German body involved in its preparation was the DIN-Normenausschuss Lebensmittel und landwirtschaftliche Produkte (DIN Standards Committee Food and Agricultural Products), Working Committee NA 057-
7、04-01 AA Tabak und Tabakerzeugnisse. The scope includes the determination of the cut width for the delimitation of fine-cut tobacco and pipe tobacco. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. DIN shall not be held responsibl
8、e for identifying any or all such patent rights. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 3402 DIN ISO 3402 ISO 5725-1 DIN ISO 5725-1 ISO 5725-2 DIN ISO 5725-2 ISO 8243 DIN ISO 8243 ISO 15592-1 DIN ISO 15592-1 ISO 15592-2 DIN ISO
9、 15592-2 Amendments This standard differs from DIN 10375:2003-10 as follows: a) Clause 1 “Scope” specifies a method for the determination of the width of strands of cut tobacco; b) Clause 2 “Normative references” now includes ISO 15592-1 and ISO 15592-2; c) Clause 4 “Principle” specifies a length of
10、 the strands of at least 20 mm; d) requirements for the sample holder have been transferred from Clause 5 “Apparatus” to Annex A “Example of a sample holder”, Subclauses 5.2 “Adhesive tape” and 5.3 “Magnifying glass” have been deleted; e) Clause 6, Subclause 6.1 “General” specifies that the atmosphe
11、re for the preparation of the strands and the determination of the cut width of fine-cut tobacco shall be in accordance with ISO 15592-2; for cigarettes, ISO 3402 shall be applied accordingly; f) Subclause 6.2 “Sampling” now makes reference to ISO 15592-1 and ISO 8243 (instead of DIN 10257-1); g) Su
12、bclause 6.4 “Preparation of the strands” states that damage to the strands should be avoided; h) Subclause 6.5.2 “Single measurements” specifies that the cut width is to be stated to the nearest 0,05 mm (formerly 0,1 mm); i) Clause 8 “Precision” specifies that the evaluation is based on the differen
13、ce between the mean of five measurements per strand (instead of the difference between two single measurements). Previous editions DIN 10375: 2003-10 3DIN ISO 20193:2015-06 National Annex NA (informative) Bibliography DIN ISO 3402, Tobacco and tobacco products Atmosphere for conditioning and testing
14、 DIN ISO 5725-1, Accuracy (trueness and precision) of measurement methods and results Part 1: General principles and definitions DIN ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a s
15、tandard measurement method DIN ISO 8243, Cigarettes Sampling DIN ISO 15592-1, Fine-cut tobacco and smoking articles made from it Methods of sampling, conditioning and analysis Part 1: Sampling DIN ISO 15592-2, Fine-cut tobacco and smoking articles made from it Methods of sampling, conditioning and a
16、nalysis Part 2: Atmosphere for conditioning and testing 4DIN ISO 20193:2015-06 Tobacco and tobacco products Determination of the width of the strands of cut tobacco1 ScopeThis International Standard specifies a method for the determination of the width of strands of cut tobacco. It is only applicabl
17、e if there is a uniform cut width.NOTE There are other ways of measuring the width of the strands of cut tobacco. A system with the same accuracy can be used, for example a microscope with an internal fitted ruler.2 Normative referencesThe following referenced documents are indispensable for the app
18、lication of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 216, Writing paper and certain classes of printed matter Trimmed sizes A and B series, and indication of machi
19、ne directionISO 3402, Tobacco and tobacco products Atmosphere for conditioning and testingISO 8243, Cigarettes SamplingISO 15592-1, Fine-cut tobacco and smoking articles made from it Methods of sampling, conditioning and analysis Part 1: SamplingISO 15592-2, Fine-cut tobacco and smoking articles mad
20、e from it Methods of sampling, conditioning and analysis Part 2: Atmosphere for conditioning and testing3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1cut widthwidth of a strand of tobacco4 PrincipleTaking into consideration the fact that the t
21、obacco samples to be analysed have a uniform cut width and that the mass of the individual tobacco strands may be disregarded, 20 strands of at least 20 mm long are randomly taken from the total test portion and measured at five equidistant points to determine their cut width.A statistical conclusio
22、n for the population may be drawn from the resulting 100 values.5DIN ISO 20193:2015-06 5 ApparatusNormal laboratory apparatus and, in particular, the following items.5.1 Sample holder, capable of holding the strands in a fixed position.Annex A gives an example of a holder including guidance for its
23、suitable dimensions.5.2 Measuring device, with an accuracy of at least 0,1 mm.6 Procedure6.1 GeneralFor production control, samples can be selected just after cutting and measured rapidly in order to minimize the influence of ambient conditions.If packed samples are analysed, the atmosphere for the
24、preparation of the strands and for the determination of the cut width of fine-cut tobacco shall be in accordance with the testing atmosphere specified in ISO 15592-2; for cigarettes, ISO 3402 shall be applied accordingly.6.2 SamplingTake the samples in accordance with ISO 15592-1 or ISO 8243.6.3 Pre
25、paration of the samplesIf samples are prepared from the packed product, a test portion of 50 g is taken.If samples are prepared from the packed product, they shall be conditioned according to ISO 15592-2 for fine-cut tobacco or ISO 3402 for cigarettes. After conditioning, spread out the test portion
26、.Spread out the test portion as evenly as possible on an area of size A3 in accordance with ISO 216.6.4 Preparation of the strandsRandomly take from the test portion 20 strands at least 20 mm long which have been cut in parallel. If it is not possible to select strands with a length of 20 mm, a sing
27、le measurement shall be made on each of 100 shorter selected strands.Secure the strands to a sample holder (5.1). Affix each strand to the surface of the sample holder perpendicular to the lines on the sample holder, taking care to ensure that the strands lie flat and are not twisted.When the strand
28、s have been affixed to the sample holder, it is covered with a transparent strip in order to secure the strands position.When securing the strands, take care to avoid stretching. Artificial damage to the strands should be avoided.6.5 Determination of cut width6.5.1 GeneralDetermine the cut width imm
29、ediately after securing the strands.Measure the cut width of each of the strands prepared in accordance with 6.4 in accordance with the procedure described in 6.5.2.6DIN ISO 20193:2015-06 6.5.2 Single measurementsThe single measurements shall be made either on or directly adjacent to the lines on th
30、e sample holder (5.1).State the cut width to the nearest 0,05 mm.7 Expression of resultsCalculate the arithmetic mean per strand from the individual measurements and report to the nearest 0,1 mm.Calculate the mean value and standard deviation from the respective mean values for the 20 or the 100 str
31、ands. Give the mean value to the nearest of 0,1 mm, the standard deviation to the nearest 0,01 mm.Enter the evaluated data in a data sheet as illustrated in the example in Annex B.8 PrecisionThe difference between the mean of five measurements per strand, obtained within the shortest feasible time i
32、nterval by the same operator working on identical sample material and using the same apparatus will exceed the repeatability limit r on average not more than once in 20 cases in the normal operation of the method.The difference between two results, reported by two laboratories for the same sample ma
33、terial will exceed the reproducibility limit R on average not more than once in 20 cases in the normal operation of the method.A collaborative study involving 14 laboratories to determine the cut width yielded the values shown in Table 1 for the repeatability limit r and reproducibility limit R as w
34、ell as for the standard deviations for repeatability and reproducibility, srand sR(see References 1 and 2).Table 1 Summary of results of the collaborative studyPrecision dataWidth of strands of cut tobacco mm0,4 1,0 1,6 3,0Repeatability limit r 0,11 0,21 0,30 0,81Standard deviation for repeatability
35、 sr0,040 0,073 0,109 0,288Reproducibility limit R 0,13 0,21 0,33 0,98Standard deviation for reproducibility sR0,047 0,073 0,118 0,351NOTE The high variability is caused by the cutters, producing a small cut of 0,4 mm.9 Test reportThe test report shall contain at least the following information:a) al
36、l particulars necessary for identification of the sample (type of sample, origin of sample, designation);b) reference to this International Standard, i.e. ISO 20193;c) time and manner of sampling;d) information on conditioning;e) time of delivery of the sample;f) date and time of testing;7DIN ISO 20
37、193:2015-06 g) room temperature at the time of testing;h) test results and units in which these are stated;i) special features observed during the test.8DIN ISO 20193:2015-06 Annex A (informative) Example of a sample holderA.1 GeneralIn the appendix, add the schematic diagram of measurement about th
38、e strands with some special shapes, such as furcation, slant. Regulate the position of measurement.Date: _ Lab: _ Sample: _Lab. condition: _ RH: _ Temp.: _Figure A.1 Example of a sample holderA.2 Guidance for suitable dimensionsSample holder with dimensions 20 mm 110 mm, subdivided by five parallel
39、lines, to the longer side, distance between the lines (3,5 0,5) mm.NOTE A microscope with an internal fitted ruler can be used.9DIN ISO 20193:2015-06 Annex B (informative) Example of a data sheetLaboratory:Time and kind of sampling:Measurement procedure applied:Cut width (mm)Mean per strand1stmeasur
40、e ment2ndmeasure ment3rdmeasure ment4thmeasure ment5thmeasure mentSample1ststrand 2ndstrand 3rdstrand Date of measure-ment:4thstrand 5thstrand 6thstrand Room temperature:7thstrand 8thstrand 9thstrand Package humidity:10thstrand 11thstrand 12thstrand Start time of meas-urement:13thstrand 14thstrand 1
41、5thstrand End time of meas-urement:16thstrand 17thstrand 18thstrand Operator:19thstrand 20thstrand Measurements with an accuracy of 0,1 mm.Comments:10DIN ISO 20193:2015-06 Bibliography1 ISO 5725-1, Accuracy (trueness and precision) of measurement methods and results Part 1: General principles and definitions2 ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of the repeatability and reproducibility of a standard measurement method11DIN ISO 20193:2015-06
