1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Paper and board Determination of moisture content of a lot Oven-drying method (ISO 287:2017)BS EN ISO 287:2017EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 287 December 2017 ICS 85.060 Supersedes EN ISO 287:2
2、009English Version Paper and board - Determination of moisture content of a lot - Oven-drying method (ISO 287:2017) Papier et carton - Dtermination de la teneur en humidit dun lot - Mthode par schage ltuve (ISO 287:2017) Papier und Pappe - Bestimmung des Feuchtegehaltes eines Lieferpostens - Wrmesch
3、rankverfahren (ISO 287:2017) This European Standard was approved by CEN on 8 December 2017. 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. Up-to-date
4、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 translation un
5、der 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, Finland, Former
6、 Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION
7、COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 287:2017 ENational forewordThis British Sta
8、ndard is the UK implementation of EN ISO 287:2017. It is identical to ISO 287:2017. It supersedes BS EN ISO 287:2009, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PAI/11, Methods of test for paper, board and pulps.A list of organizations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
9、 on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 9060
10、2 2ICS 85.060Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS E
11、N ISO 287:2017EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 287 December 2017 ICS 85.060 Supersedes EN ISO 287:2009English Version Paper and board - Determination of moisture content of a lot - Oven-drying method (ISO 287:2017) Papier et carton - Dtermination de la teneur en humidit dun l
12、ot - Mthode par schage ltuve (ISO 287:2017) Papier und Pappe - Bestimmung des Feuchtegehaltes eines Lieferpostens - Wrmeschrankverfahren (ISO 287:2017) This European Standard was approved by CEN on 8 December 2017. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipu
13、late 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 CEN-CENELEC Management Centre or to any CEN member. This European S
14、tandard 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the
15、national standards bodies of 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,
16、 Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2017 CEN All rights of exploitation in any for
17、m and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 287:2017 EBS EN ISO 287:2017EN ISO 287:2017 (E) 3 European foreword This document (EN ISO 287:2017) has been prepared by Technical Committee ISO/TC 6 “Paper, board and pulps” in collaboration with Technical Committee CEN
18、/TC 172 “Pulp, paper and board” the secretariat of which is held by DIN. 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 June 2018 and conflicting national standards shall be withdrawn at the late
19、st by June 2018. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 287:2009. According to the CEN-CENELEC Internal Regu
20、lations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, I
21、taly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 287:2017 has been approved by CEN as EN ISO 287:2017 without any modification. BS EN I
22、SO 287:2017ISO 287:2017(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 15 Apparatus . 26 Preparation of containers . 27 Sampling 28 Selection, preparation and weighing of test pieces 28.1 General . 28.2 If the unit is a package that can be and ma
23、y be unwrapped, or is in an unwrapped form 28.2.1 When the unit is not subdivided and not a reel 28.2.2 When the unit is composed of elements . 48.2.3 When the unit is a reel 58.3 When the unit is a package that cannot or should not be completely unwrapped 58.3.1 Average moisture content for samples
24、 with known machine direction 58.3.2 Average moisture content for samples with unknown machine direction . 68.3.3 Variations in moisture content of sheets or across the reel . 69 Procedure. 69.1 Initial drying and weighing 69.2 Drying and weighing to constant mass 610 Calculation and expression of r
25、esults . 710.1 Calculation 710.2 Expression of results 711 Test report . 711.1 General . 711.2 When an average moisture content is required . 711.3 When a variation in moisture content is required . 7Annex A (informative) Precision data . 9Bibliography .10 ISO 2017 All rights reserved iiiContents Pa
26、geBS EN ISO 287:2017ISO 287:2017(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 technical committees. Each member body int
27、erested 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 closely with the International Electrotechnic
28、al 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 needed for the different types of ISO docu
29、ments 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 patent rights. ISO shall not be held responsib
30、le 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 in this document is information given for
31、the convenience of users and does not constitute an endorsement.For an explanation on the voluntary nature of standards, 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) principles in
32、 the Technical Barriers to Trade (TBT), see the following URL: www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 6, Paper, board and pulps, Subcommittee SC 2, Test methods and quality specifications for paper and board.This fourth edition cancels and replaces the
33、 third edition (ISO 287:2009), which has been technically revised.The main changes compared to the previous edition are as follows: precision data (previously in Clause 11) have been moved to Annex A; editorial changes have been made for clarification and removal of inconsistencies.iv ISO 2017 All r
34、ights reservedBS EN ISO 287:2017ISO 287:2017(E)IntroductionThe determination of dry matter content and moisture content are carried out for different purposes.ISO 638 is used in cases where the dry matter content is needed to calculate the result of chemical analysis or physical testing and when the
35、 determination of the moisture content of a sample, rather than a lot, is required. As an example, the dry matter content of the sample is needed to express the content of elements, such as cadmium and manganese, in relation to the oven-dry mass of the sample.This document is used for the purpose of
36、 determining the average moisture content and the variation in moisture content (maximum and minimum values) of a lot. In the paper and board trade, the moisture content is important since it influences converting processes, such as printing and copying. The moisture content also has an influence on
37、 curl and dimensional stability. ISO 2017 All rights reserved vBS EN ISO 287:2017Paper and board Determination of moisture content of a lot Oven-drying method1 ScopeThis document specifies an oven-drying method for the determination of the moisture content of a lot of paper and board. The procedure
38、in Clause 8, describing how the test pieces are drawn from the lot, is performed at the time of sampling.This document is applicable to every type of lot of paper and board, including corrugated board and solid board, provided that the paper or board does not contain any substances, other than water
39、, that are volatile at the temperature specified in this document.NOTE For determination of the dry matter content of a sample of paper or board, e.g. for calculation of the dry mass of the sample, ISO 6381can be used.2 Normative referencesThe following documents are referred to in the text in such
40、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 board Sampling to determine average qua
41、lity3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: availa
42、ble at http:/www.iso.org/obp3.1moisture contentwHO2content of water in paper or board, i.e. the ratio of the loss of mass of a test piece, when dried under specified conditions, to its mass at the time of samplingNote 1 to entry: The moisture content is normally expressed as a percentage mass fracti
43、on.3.2constant massmass reached by a test piece of paper or board after drying at a temperature of (105 2) C until the difference between two successive dryings and weighings, separated in time by at least half the initial drying period, does not exceed 0,1 % of the initial mass of the test piece at
44、 the time of sampling4 PrincipleAt the time of sampling, test pieces taken from a lot are weighed and the test pieces are weighed again after drying to constant mass. From the mass of a test piece before and after drying, the moisture content is calculated.INTERNATIONAL STANDARD ISO 287:2017(E) ISO
45、2017 All rights reserved 1BS EN ISO 287:2017ISO 287:2017(E)5 Apparatus5.1 Balance, having an accuracy of 0,05 % of the mass to be weighed, or better.5.2 Containers, for the transport and weighing of test pieces, which shall be water-vapour proof and made from a lightweight material that is not subje
46、ct to change under the conditions of test.5.3 Oven, capable of maintaining the air temperature at (105 2) C, and suitably ventilated to maintain a uniform temperature in the usable volume while extracting the moisture driven off the test pieces.5.4 Desiccator.6 Preparation of containersBefore sampli
47、ng, number a sufficient number of clean, dry containers (5.2). Allow the containers to attain temperature equilibrium with the atmosphere. Use a balance (5.1) and weigh each container. Keep the containers closed until the sample is about to be taken.7 SamplingSelect the units to be sampled in accord
48、ance with ISO 186.Precautions shall be taken when handling the paper or board to avoid contamination and any gain or loss of moisture if the atmosphere at the place of sampling is warm and damp. It is recommended to wear plastic or rubber gloves. To avoid moisture changes due to atmospheric exposure
49、, it is important to enclose all test pieces in their containers immediately after taking them.8 Selection, preparation and weighing of test pieces8.1 GeneralFor each unit withdrawn from the lot, proceed as specified in 8.2 or 8.3. Report the procedure that was used (for selection, preparation and weighing) along with other reported results (as described in Clause 11).8.2 If the unit is a package that can be and may be unwrapped, or is in an unwrapped form8.2.1 When the unit is not subdivided and not a reel8.2.1.1 Ave
