1、BS EN ISO 12625-6:2016Tissue paper and tissueproductsPart 6: Determination of grammage (ISO12625-6:2016)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 12625-6:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 12
2、625-6:2016. It supersedes BS EN ISO 12625-6:2005 which iswithdrawn.The UK participation in its preparation was entrusted to Technical Committee PAI/11, Methods of test for paper, board and pulps.A list of organizations represented on this committee can be obtained on request to its secretary.This pu
3、blication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017.Published by BSI Standards Limited 2017ISBN 978 0 580 90265 9 ICS 85.080.20 Compliance with a British Standard cannot confer imm
4、unity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2017.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 12625-6 December 2
5、016 ICS 85.060 Supersedes EN ISO 12625-6:2005English Version Tissue paper and tissue products - Part 6: Determination of grammage (ISO 12625-6:2016) Papier tissue et produits tissue - Partie 6: Dtermination du grammage (ISO 12625-6:2016) Tissue-Papier und Tissue-Produkte - Teil 6: Bestimmung der flc
6、henbezogenen Masse (ISO 12625-6:2016) This European Standard was approved by CEN on 21 November 2016. 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. U
7、p-to-date lists and bibliographical references concerning such national standards may be obtained 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 tran
8、slation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC 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, Finla
9、nd, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION
10、 COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 12625-6:2016 EBS EN ISO 12625-6:2016EN ISO 126
11、25-6:2016 (E) 3 European foreword This document (EN ISO 12625-6:2016) has been prepared by Technical Committee ISO/TC 6 “Paper, board and pulps“ in collaboration with Technical Committee CEN/TC 172 “Pulp, paper and board” the secretariat of which is held by DIN. This European Standard shall be given
12、 the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2017, and conflicting national standards shall be withdrawn at the latest by June 2017. Attention is drawn to the possibility that some of the elements of this document may be the
13、subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 12625-6:2005. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to impl
14、ement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania
15、, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 12625-6:2016 has been approved by CEN as EN ISO 12625-6:2016 without any modification. BS EN ISO 12625-6:2016ISO 12625-6:2016(E)Foreword iv1 Scope . 12 Normative references 13 Terms an
16、d definitions . 14 Principle 15 Apparatus . 26 Sampling 27 Conditioning 28 Preparation of test pieces . 28.1 General . 28.2 Cutting of the test pieces 38.2.1 General 38.2.2 Size of test pieces . 38.2.3 Number of test pieces 38.3 Uncut finished products 38.3.1 General 38.3.2 Size of test pieces . 38.
17、3.3 Number of test pieces 39 Procedure. 49.1 Determination of the mass of the test pieces 49.2 Determination of the area of the test pieces . 410 Calculation 410.1 General . 410.2 Mean and standard deviation of grammage 511 Test report . 5Annex A (informative) Precision . 7Bibliography .10 ISO 2016
18、All rights reserved iiiContents PageBS EN ISO 12625-6:2016ISO 12625-6:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO
19、technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates clo
20、sely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria
21、needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of pate
22、nt rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used
23、in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) princi
24、ples in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.This document was prepared by the European Committee Standardization (CEN) Technical Committee CEN/TC 172, Pulp, paper and board, in collaboration with ISO Technical Committee TC 6, Paper, board and pu
25、lps, Subcommittee SC 2, Test methods and quality specifications for paper and board, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).This second edition cancels and replaces the first edition (ISO 12625-6:2005), which has been technically revised with
26、 the following changes:a) a new subclause, 8.3, has been added;b) formulae were added to clarify Clause 10;c) in Annex A, the precision data has been updated;d) this document has been editorially updated.A list of all parts in the ISO 12625 series can be found on the ISO website.iv ISO 2016 All righ
27、ts reservedBS EN ISO 12625-6:2016INTERNATIONAL STANDARD ISO 12625-6:2016(E)Tissue paper and tissue products Part 6: Determination of grammage1 ScopeThis document specifies a test method for the determination of grammage of tissue paper and tissue products.2 Normative referencesThe following document
28、s are referred to in the text in such a way that some or all of their content constitutes requirements 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 186, Paper and b
29、oard Sampling to determine average qualityISO 187, Paper, board and pulps Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.ISO an
30、d IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp3.1grammagegmass of a unit area of tissue paper or tissue product as determined by
31、 the procedure in this documentNote 1 to entry: Grammage is expressed in grams per square metre (g/m2).4 PrincipleThe mass and area of a test piece or test pieces of either a tissue paper or a tissue product is measured and the grammage is calculated as the mass per unit area of the test pieces take
32、n. For finished paper products, the grammage may also be calculated from the mass and area of a specified number of the finished tissue product items. Precision data are available in Annex A. ISO 2016 All rights reserved 1BS EN ISO 12625-6:2016ISO 12625-6:2016(E)5 Apparatus5.1 GeneralThe balance sha
33、ll be placed on a horizontal surface free from externally induced vibrations.5.2 Cutting deviceThe cutting device shall be capable of repeatedly cleanly cutting test pieces of the same nominal size, whose area falls within 1,0 % of a known area. This shall be checked frequently by measurement and, p
34、rovided that the above accuracy is attained, the mean area obtained in these checks shall be used for calculating grammage.With certain types of tissue paper and tissue product, it will be found, after carrying out this determination of area, that test pieces cannot be cut with the accuracy just def
35、ined. In such instances, the area of every test piece shall be determined individually.5.3 BalanceThe device to determine the balance shall have a measuring accuracy of 0,001 g.5.4 Length measurement deviceThe length measurement device shall be a ruler, an electronic digital ruler, a scanner or any
36、other device with a minimum measuring accuracy of 0,5 mm.6 SamplingIf the tests are being made to evaluate a lot, the sample shall be selected in accordance with ISO 186.If the tests are being made on another type of sample, make sure that all specimens taken are representative of the sample. Each t
37、est piece shall be free from perforations and faults not normally inherent in the tissue.7 ConditioningCondition the samples according to ISO 187 and keep them in the standard atmosphere throughout the test.Conditioning shall be done prior to the preparation of test pieces.8 Preparation of test piec
38、es8.1 GeneralTest pieces shall be free from areas containing creases, dirt or visible damage. Test pieces shall be made of either areas cut from specimens of tissue paper or tissue products (see 8.2), or made of whole finished products (see 8.3).2 ISO 2016 All rights reservedBS EN ISO 12625-6:2016IS
39、O 12625-6:2016(E)8.2 Cutting of the test pieces8.2.1 GeneralIn the case where test pieces are cut from specimens of tissue paper or tissue products, the test sheet or stack of superimposed test sheets can be placed between two supporting sheets of paper, such as office copy paper, in order to obtain
40、 test pieces with clean cut edges and dimensions of the accuracy specified.8.2.2 Size of test piecesSince tissue paper and tissue products vary greatly in dimensions, it is only possible to give general guidance regarding the dimension of the test piece or test pieces.The minimum area of an individu
41、al test piece shall be at least 100 cm2. One test piece may, if necessary, be composed of several smaller pieces.8.2.3 Number of test piecesUsing the cutting device (5.2), cut at least 10 test pieces. The mass of a minimum area of 1 000 cm2shall be determined, and convenient larger areas shall be ta
42、ken in compliance with the provisions of this document.8.3 Uncut finished products8.3.1 GeneralIn the case where test pieces are composed of finished tissue products, test pieces shall lie unfolded and flat with no tension applied.If a scanner is used for this measurement, ensure that the scanner-co
43、ver is sufficient in size to cause the item to lie flat.If a ruler is used, it shall be of dimensions larger than the test piece.8.3.2 Size of test piecesSince tissue paper and tissue products vary greatly in dimensions, it is only possible to give general guidance regarding the dimension of the tes
44、t piece or test pieces.Using a measuring device (5.4) as described, the minimum area of an individual test piece shall be at least 100 cm2. One test piece may, if necessary, be composed of several smaller pieces.8.3.3 Number of test piecesThe minimum number of test pieces shall be 10. The mass of a
45、minimum area of 1 000 cm2shall be determined, and convenient larger areas shall be taken in compliance with the provisions of this document.The 10 or more test pieces (finished product items) shall be selected from the sample in a random manner so as to represent variation in size and mass of the fi
46、nished product item present in the sample. In any case, sequential finished product units shall never be tested, except in cases where the sample is very limited in quantity. ISO 2016 All rights reserved 3BS EN ISO 12625-6:2016ISO 12625-6:2016(E)9 Procedure9.1 Determination of the mass of the test p
47、iecesDetermine the mass of each test piece on the balance (5.3) to the nearest 0,001 g.It is recommended, especially when dealing with small test pieces, that touching the test pieces with bare hands is avoided.If the standard deviation is not needed, the total mass of all 10 or more test pieces may
48、 be determined by weighing all test pieces together.Any deviation from the procedure described above shall be explicitly mentioned in the test report.9.2 Determination of the area of the test pieces9.2.1 When test pieces have been cut to specified dimensions as described in 8.2, determine the area o
49、f each individual test piece.9.2.2 For the determination of grammage on finished paper products, the total area shall be measured to an accuracy of better than 1 % using a measuring device (5.4) as described.When the test pieces are measured, they shall lie unfolded and flat with no tension applied.If a scanner is used for this measurement, closing the scan cover is usually sufficient to cause the item to lie flat. Likewise, placing a steel rule along the edge is usually sufficient. Where a digital ruler is used, the finished product should be flatten
