00255733 PDF BRITISH STANDARD BS EN 23270 1991 ISO 3270 1984 Specification for Temperatures and humidities for conditioning and testing paints, varnishes and their raw materials — This European Standa[.]
BRITISH STANDARD Specification for Temperatures and humidities for conditioning and testing paints, varnishes and their raw materials — This European Standard EN 23270:1991 has the status of a British Standard BS EN 23270:1991 ISO 3270:1984 BS EN 23270:1991 Cooperating organizations The European Committee for Standardization, under whose supervision this European Standard was prepared, comprises the national standards organizations of the following Western European countries Austria Belgium Denmark Finland France Germany Greece Iceland Ireland Italy Luxembourg Netherlands Norway Portugal Spain Sweden Switzerland United Kingdom This British Standard was published under the authority of the 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 comment 87/50031 DC ISBN 580 20192 Oesterreichisches Normungsinstitut Institut belge de normalisation Dansk Standardiseringsraad Suomen Standardisoimisliito, r.y Association franỗaise de normalisation Deutsches Institut fỹr Normung e.V Hellenic Organization for Standardization Technological Institute of Iceland National Standards Authority of Ireland Ente Nazionale Italiano di Unificazione Inspection du Travail et des Mines Nederlands Normalisatie-instituut Norges Standardiseringsforbund Instituto Portuguès da Qualidade Asociación Espola de Normalización y Certificación Standardiseringskommissionen i Sverige Association suisse de normalisation British Standards Institution Amendments issued since publication Amd No Date Comments BS EN 23270:1991 Contents Cooperating organizations National foreword Foreword Text of EN 23270 National appendix NA (informative) © BSI 08-1999 Page Inside front cover ii Inside back cover i BS EN 23270:1991 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 EN 23270 “Paints and varnishes and their raw materials — Temperatures and humidities for conditioning and testing”, published by the European Committee for Standardization (CEN) It is identical to ISO 3270:1984 “Paints and varnishes and their raw materials — Temperatures and humidities for conditioning and testing”, published by the International Organization for Standardization (ISO) ISO 3270:1984 was previously published as Annex A to BS 3900 “Methods of test for paints” — Part 0:1989 “General introduction” BS 3900-0 is being amended and Annex A to that standard will be replaced by a reference to BS EN 23270 A British Standard does not purport to include all the necessary provisions of a contract 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, pages i and ii, the EN title page, pages to 4, an inside 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 ii © BSI 08-1999 EUROPEAN STANDARD EN 23270 NORME EUROPÉENNE August 1991 EUROPÄISCHE NORM UDC 667.612:620.1:551.584 Descriptors: 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 (ISO 3270:1984) Peintures et vernis et leurs matières premières — Températures et humidités pour le conditionnement et l’essai (ISO 3270:1984) Lacke, Anstrichstoffe und deren Rohstoffe — Temperaturen und Luftfeuchten für Konditionierung und Prüfung (ISO 3270:1984) This European Standard was approved by CEN on August 1991 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 lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat 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 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 standards 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 Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © CEN 1991 Copyright reserved to all CEN members Ref No EN 23270:1991 E EN 23270:1991 Foreword This European Standard is the endorsement ISO 3270 Endorsement of ISO 3270 was recommended by CEN/TC 139, Paints and varnishes, under whose competence this European Standard will henceforward fall National standards identical to this European Standard shall be published at the latest by February 1992 and conflicting national standards shall be withdrawn at the latest by February 1992 The standard was approved and, in accordance with 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 the United Kingdom Contents Foreword Introduction Scope and field of application Reference Definitions Temperatures and humidities for conditioning and testing Conditioning Testing Page 3 3 3 Endorsement notice The text of the International Standard ISO 3270:1984 was approved by CEN as a European Standard without any modification © BSI 08-1999 EN 23270:1991 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 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 those required for the conditioning and testing atmosphere (see the note to 4.2) 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 validity of such data and since much laboratory apparatus (for example burettes, pipettes, pyknometers) is not calibrated at 23 °C, specific deviation from this International Standard may be necessary It is strongly recommended that in these cases physical data should also be determined at the conditions specified in this International Standard in order to facilitate a progressive move towards general adoption of the standard conditions at some future date NOTE The 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 keeping it for a given period of time in the conditioning atmosphere NOTE The 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 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 NOTE The test may be carried out either in the laboratory or in a special chamber termed “the test chamber ”, or in the conditioning 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 Temperatures and humidities for conditioning and testing 4.1 Standard conditions (to be used whenever possible) 23 ± °C and 50 ± % relative humidity 4.2 Standard temperature 23 ± °C and ambient relative humidity NOTE For some tests the limits for control of temperature are more strict For example when determining viscosity or consistency, control limits of at most ± 0.5 °C are recommended Scope and field of application 4.3 Other conditions This International Standard specifies conditions of temperature and relative humidity for general use in the conditioning 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 Reference 4.3.1 For countries where the standard conditions of 4.1 and 4.2 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 conditions, where neither the temperature nor relative humidity have to be controlled, but these conditions, if known, should be noted in the test report ISO 558, Conditioning and testing — Standard atmospheres — Definitions Conditioning Definitions (derived from ISO 558) 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 The selected values and period of time depend on the nature of the sample or test piece to be tested © BSI 08-1999 5.1 The period of conditioning shall be as specified in the particular test method under consideration 5.2 The products to be tested shall 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 atmosphere should be clean Test panels shall be separated from each other and from the walls of the enclosure by a distance of at least 20 mm EN 23270:1991 Testing Unless otherwise specified, the products shall be tested under the same conditions as those in which they have been conditioned If the standard conditions, specified in 4.1, have been used for conditioning and testing, the test report shall state: Conditioned, for h, and tested under the standard conditions conforming to ISO 3270 If the standard conditions specified in 4.1 have not been used, but other conditions have been chosen, the test report shall state those conditions © BSI 08-1999 BS EN 23270:1991 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 Committee 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 Paintmakers’ Association of Great Britain Ltd Titanium Pigment Manufacturers’ Technical Committee © BSI 08-1999 BS EN 23270:1991 ISO 3270:1984 BSI — British Standards Institution BSI is the independent national body responsible for preparing British Standards It 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