1、BRITISH STANDARD BS EN 23270:1991 ISO3270:1984 Specification for Temperatures and humidities for conditioning and testing paints, varnishes and their raw materials This European Standard EN23270:1991 has the status of a British StandardBSEN23270:1991 This British Standard was published under the aut
2、hority ofthe Standards Board and comes into effect on 29 November 1991 BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference PVC/10 Draft for comment87/50031DC ISBN 0 580 20192 9 Cooperating organizations The European Committee for Standardization, under w
3、hose supervision this European Standard was prepared, comprises the national standards organizations of the following Western European countries. Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito,
4、 r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspectio
5、n du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Certificacin Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation
6、United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBSEN23270:1991 BSI 08-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN23270 3 National appendix NA (informative) Inside back coverBSEN232
7、70:1991 ii BSI 08-1999 National foreword This British Standard has been prepared under the direction of the Pigments, Paints and Varnishes Standards Policy Committee, and is the English language version of EN23270 “Paints and varnishes and their raw materials Temperatures and humidities for conditio
8、ning and testing”, published by the European Committee for Standardization (CEN). It is identical to ISO3270:1984 “Paints and varnishes and their raw materials Temperatures and humidities for conditioning and testing”, published by the International Organization for Standardization (ISO). ISO3270:19
9、84 was previously published as Annex A to BS3900 “Methods of test for paints”Part0:1989 “General introduction”. BS3900-0is being amended and Annex A to that standard will be replaced by a reference to BS EN23270. A British Standard does not purport to include all the necessary provisions of a contra
10、ct. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to4, an in
11、side back cover and back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN23270 August 1991 UDC 667.612:620.1:551.584 Descri
12、ptors: Paints, varnishes, raw materials, conditioning, temperature, test atmospheres, humidity English version Paints and varnishes and their raw materials Temperatures and humidities for conditioning and testing (ISO3270:1984) Peintures et vernis et leurs matires premires Tempratures et humidits po
13、ur le conditionnement et lessai (ISO3270:1984) Lacke, Anstrichstoffe und deren Rohstoffe Temperaturen und Luftfeuchten fr Konditionierung und Prfung (ISO3270:1984) This European Standard was approved by CEN on 5 August 1991. CEN members are bound to comply with the CEN/CENELEC Internal Regulations w
14、hich 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 member. This European S
15、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 Central Secretariat has the same status as the official versions. CEN members are the national s
16、tandards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung
17、Central Secretariat: rue de Stassart 36, B-1050 Brussels CEN 1991 Copyright reserved to all CEN members Ref. No. EN23270:1991 EEN23270:1991 BSI 08-1999 2 Foreword This European Standard is the endorsement ISO3270. Endorsement of ISO3270 was recommended by CEN/TC139, Paints and varnishes, under whose
18、 competence this European Standard will henceforward fall. National standards identical to this European Standard shall be published at the latest by8 February1992 and conflicting national standards shall be withdrawn at the latest by8 February1992. The standard was approved and, in accordance with
19、CEN/CENELEC Internal Regulation, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and theUnitedKingdom. Endorsement notice
20、 The text of the International Standard ISO3270:1984 was approved by CEN as a EuropeanStandard without any modification. Contents Page Foreword 2 0 Introduction 3 1 Scope and field of application 3 2 Reference 3 3 Definitions 3 4 Temperatures and humidities for conditioning and testing 3 5 Condition
21、ing 3 6 Testing 4EN23270:1991 BSI 08-1999 3 0 Introduction The physical and mechanical properties of paints, varnishes and their raw materials are generally dependent on the test environmental conditions, the most important variables being temperature and humidity. The degree to which each of these
22、variables needs to be controlled is determined by the significance of the effect on the variable on the property being measured. Thus for measurement of viscosity, refractive index and density, it is essential to specify and control the temperature of the test portion to much closer limits than thos
23、e required for the conditioning and testing atmosphere (seethenoteto4.2). It is recognized that many data on, for example, viscosity, flow times and density have been determined, historically, at temperatures different from that specified in this International Standard. In order to preserve the vali
24、dity of such data and since much laboratory apparatus (for example burettes, pipettes, pyknometers) is not calibrated at23 C, specific deviation from this InternationalStandard may be necessary. It is strongly recommended that in these cases physical data should also be determined at the conditions
25、specified in this International Standard in order to facilitate a progressive move towards general adoption of the standard conditions at some future date. 1 Scope and field of application This International Standard specifies conditions of temperature and relative humidity for general use in the co
26、nditioning and testing of paints and varnishes and their raw materials. It is applicable to paints and varnishes in liquid or powder form, to wet or dry films, and their raw materials. 2 Reference ISO558, Conditioning and testing Standard atmospheres Definitions. 3 Definitions (derived from ISO558)
27、3.1 conditioning atmosphere the atmosphere in which a sample or test piece is kept before being subjected to test. It is characterized by specified values for either one or both parameters: temperature and relative humidity, which are kept within the prescribed tolerances for a given period of time.
28、 The selected values and period of time depend on the nature of the sample or test piece to be tested NOTE 1The term “conditioning ” refers to the operation as a whole designed to bring a sample or test piece, before testing, into a specified condition in relation to temperature and humidity, by kee
29、ping it for a given period of time in the conditioning atmosphere. NOTE 2The conditioning can be done either in the laboratory or in a special enclosure termed “the conditioning chamber” or in the test chamber. 3.2 test atmosphere the atmosphere to which a sample or test piece is exposed throughout
30、the test. It is characterized by specified values for either one or both parameters: temperature and relative humidity, which are kept within the prescribed tolerances NOTEThe test may be carried out either in the laboratory or in a special chamber termed “the test chamber ”, or in the conditioning
31、chamber, the choice depending on the nature of the sample or test piece and on the test itself. For example, close control of the test atmosphere may not be necessary if the change of properties of the sample or test piece is insignificant in the test period. 4 Temperatures and humidities for condit
32、ioning and testing 4.1 Standard conditions (to be used whenever possible) 23 2 C and50 5% relative humidity. 4.2 Standard temperature 23 2 C and ambient relative humidity. NOTEFor some tests the limits for control of temperature are more strict. For example when determining viscosity or consistency,
33、 control limits of at most 0.5 C are recommended. 4.3 Other conditions 4.3.1 For countries where the standard conditions of4.1 and4.2 are difficult to maintain, and for other than referee purposes, other conditions may be specified, and these shall be noted in the test report. 4.3.2 Ambient conditio
34、ns, where neither the temperature nor relative humidity have to be controlled, but these conditions, if known, should be noted in the test report. 5 Conditioning 5.1 The period of conditioning shall be as specified in the particular test method under consideration. 5.2 The products to be tested shal
35、l be placed in the conditioning atmosphere so that they reach equilibrium with the atmosphere as soon as possible. The relevant parts of the apparatus shall also be placed in the conditioning atmosphere so that they reach equilibrium. The products shall be protected from direct sunlight and the atmo
36、sphere should be clean. Test panels shall be separated from each other and from the walls of the enclosure by a distance of at least20mm.EN23270:1991 4 BSI 08-1999 6 Testing Unless otherwise specified, the products shall be tested under the same conditions as those in which they have been conditione
37、d. If the standard conditions, specified in4.1, have been used for conditioning and testing, the test report shall state: Conditioned, for . h, and tested under the standard conditions conforming to ISO3270. If the standard conditions specified in4.1 have not been used, but other conditions have bee
38、n chosen, the test report shall state those conditions.BSEN23270:1991 BSI 08-1999 National appendix NA (informative) The United Kingdom participation in the preparation of this European Standard was entrusted by the Pigments, Paints and Varnishes Standards Policy Committee (PVC/-) to Technical Commi
39、ttee PVC/10, upon which the following bodies were represented: British Gas plc British Resin Manufacturers Association Chemical Industries Association Health and Safety Executive Institute of Metal Finishing Ministry of Defence Oil and Colour Chemists Association Paint Research Association Paintmake
40、rs Association of Great Britain Ltd. Titanium Pigment Manufacturers Technical CommitteeBS EN 23270:1991 ISO3270:1984 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on sta
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