Bsi bs en 23270 1991 (1999) iso 3270 1984

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[.]

ISO 3270:1984

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

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 0 580 20192 9

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 Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y

France Association française de normalisation Germany Deutsches Institut für 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 Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portuguès da Qualidade Spain Asociación Española de Normalización y Certificación Sweden Standardiseringskommissionen i Sverige

Switzerland Association suisse de normalisation United Kingdom British Standards Institution

Amendments issued since publication

Amd No Date Comments

© BSI 08-1999 i

Contents

Page Cooperating organizations Inside front cover

National appendix NA (informative) Inside back cover

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 2 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

EUROPÄISCHE NORM August 1991

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 5 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

© BSI 08-1999

2

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 8 February 1992 and conflicting national

standards shall be withdrawn at the latest

by 8 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

Endorsement notice

The text of the International Standard

ISO 3270:1984 was approved by CEN as a

European Standard without any modification

Contents

Page

1 Scope and field of application 3

4 Temperatures and humidities for conditioning and testing 3

© 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 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

1 Scope and field of application

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

2 Reference

ISO 558, Conditioning and testing — Standard

atmospheres — Definitions

3 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

NOTE 1 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 2 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.

4 Temperatures and humidities for conditioning and testing

4.1 Standard conditions (to be used whenever possible)

23 ± 2 °C and 50 ± 5 % relative humidity

4.2 Standard temperature

23 ± 2 °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.

4.3 Other conditions 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

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 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

6 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

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

BS EN

23270:1991

ISO 3270:1984

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