Plastics - Decorative solid surfacing materials - Part 3: Determination of properties - Solid surface shapes (ISO 19712-3:2007)

This part of ISO 19712 specifies the methods of test for determination of the properties of solid surfacing materials, as defined in Clause 3, in the form of shaped products. These methods are primarily intended for testing the materials specified in ISO 19712-1. The tests may be carried out on finished products, but are generally carried out on test panels of a size sufficient to meet the requirements of the test, and of the same material and finish as the finished product.

Kunststoffe - Dekorative Mineralwerkstoffe - Teil 3: Prüfverfahren - Formteile (ISO 19712-3:2007)

Der vorliegende Teil der ISO 19712 legt Prüfverfahren zur Bestimmung der Eigenschaften von verschiedenen Formteilen aus Mineralwerkstoffen fest, die in Abschnitt 3 definiert sind. Diese Verfahren sind hauptsächlich zur Prüfung der in ISO 19712-1 festgelegten Werkstoffe vorgesehen.
Die Prüfungen können an fertigen Erzeugnissen durchgeführt werden, werden jedoch im Allgemeinen an Prüf-platten vorgenommen, deren Größe ausreichend ist, um die Prüfanforderungen zu erfüllen und die aus dem gleichen Material bestehen und die gleiche Oberflächenbeschaffenheit aufweisen, wie die fertigen Erzeug-nisse.

Plastiques - Matériaux décoratifs massifs de revêtement de surface - Partie 3: Détermination des propriétés - Produits mis en forme (ISO 19712-3:2007)

L'ISO 19712-3:2007 spécifie les méthodes d'essai pour la détermination des propriétés des matériaux massifs de revêtement de surface sous forme de produits formés. Ces méthodes sont principalement destinées à la réalisation des essais sur les matériaux spécifiés dans l'ISO 19712-1.

Polimerni materiali - Dekorativni trdni površinski materiali - 3. del: Ugotavljanje lastnosti - Oblika (ISO 19712-3:2007)

General Information

Status
Withdrawn
Publication Date
20-Jan-2014
Withdrawal Date
20-Apr-2022
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
21-Apr-2022
Due Date
14-May-2022
Completion Date
21-Apr-2022

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SLOVENSKI STANDARD
SIST EN ISO 19712-3:2014
01-februar-2014
Polimerni materiali - Dekorativni trdni površinski materiali - 3. del: Ugotavljanje
lastnosti - Oblika (ISO 19712-3:2007)
Plastics - Decorative solid surfacing materials - Part 3: Determination of properties - Solid
surface shapes (ISO 19712-3:2007)
Kunststoffe - Dekorative Mineralwerkstoffe - Teil 3: Prüfverfahren - Formteile (ISO 19712
-3:2007)
Plastiques - Matériaux décoratifs massifs de revêtement de surface - Partie 3:
Détermination des propriétés - Produits mis en forme (ISO 19712-3:2007)
Ta slovenski standard je istoveten z: EN ISO 19712-3:2013
ICS:
83.140.20 /DPLQDWQHSORãþH Laminated sheets
SIST EN ISO 19712-3:2014 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 19712-3:2014

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SIST EN ISO 19712-3:2014


EUROPEAN STANDARD
EN ISO 19712-3

NORME EUROPÉENNE

EUROPÄISCHE NORM
January 2013
ICS 83.140.20
English Version
Plastics - Decorative solid surfacing materials - Part 3:
Determination of properties - Solid surface shapes (ISO 19712-
3:2007)
Plastiques - Matériaux décoratifs massifs de revêtement de Kunststoffe - Dekorative Mineralwerkstoffe - Teil 3:
surface - Partie 3: Détermination des propriétés - Produits Prüfverfahren - Formteile (ISO 19712-3:2007)
mis en forme (ISO 19712-3:2007)
This European Standard was approved by CEN on 22 December 2012.

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 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
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,
Finland, 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 and United
Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 19712-3:2013: E
worldwide for CEN national Members.

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SIST EN ISO 19712-3:2014
EN ISO 19712-3:2013 (E)
Contents Page
Foreword .3

2

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SIST EN ISO 19712-3:2014
EN ISO 19712-3:2013 (E)
Foreword
The text of ISO 19712-3:2007 has been prepared by Technical Committee ISO/TC 61 “Plastics” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 19712-3:2013 by
Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN.
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 July 2013, and conflicting national standards shall be withdrawn at the
latest by July 2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organisations 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, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 19712-3:2007 has been approved by CEN as a EN ISO 19712-3:2013 without any
modification.

3

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SIST EN ISO 19712-3:2014

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SIST EN ISO 19712-3:2014

INTERNATIONAL ISO
STANDARD 19712-3
First edition
2007-12-15

Plastics — Decorative solid surfacing
materials —
Part 3:
Determination of properties — Solid
surface shapes
Plastiques — Matériaux décoratifs massifs de revêtement de surface —
Partie 3: Détermination des propriétés — Produits mis en forme




Reference number
ISO 19712-3:2007(E)
©
ISO 2007

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SIST EN ISO 19712-3:2014
ISO 19712-3:2007(E)
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All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
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ii © ISO 2007 – All rights reserved

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SIST EN ISO 19712-3:2014
ISO 19712-3:2007(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 2
4 Cleaning the test specimen surface . 2
5 Surface defects . 2
6 Resistance to impact by large-diameter ball .3
7 Lightfastness. 5
8 Stain/chemical-resistance test . 10
9 Resistance to cigarette burns . 17
10 Resistance to dry heat. 25
11 Resistance to wet heat . 31
12 Hot/cold-cycle water-resistance test . 34
13 Hardness. 38
14 Ability to be renewed. 38
Bibliography . 39

© ISO 2007 – All rights reserved iii

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SIST EN ISO 19712-3:2014
ISO 19712-3:2007(E)
Foreword
ISO (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 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 closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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 responsible for identifying any or all such patent rights.
ISO 19712-3 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 11, Products.
ISO 19712 consists of the following parts, under the general title Plastics — Decorative solid surfacing
materials:
⎯ Part 1: Classification and specifications
⎯ Part 2: Determination of properties — Sheet goods
⎯ Part 3: Determination of properties — Solid surface shapes
iv © ISO 2007 – All rights reserved

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SIST EN ISO 19712-3:2014
ISO 19712-3:2007(E)
Introduction
This part of ISO 19712 is intended for use by manufacturers, installers and specifiers of solid surfacing
materials.
The test methods and minimum performance values presented have been related as closely as possible to
end-use applications. The fabrication techniques employed may, however, have a bearing on product
performance and service.
The performance requirements include impact resistance, structure, renewability, colourfastness, cleanability,
stain resistance, water resistance, chemical resistance, bacterial and fungal resistance, and other significant
properties.

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SIST EN ISO 19712-3:2014

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SIST EN ISO 19712-3:2014
INTERNATIONAL STANDARD ISO 19712-3:2007(E)

Plastics — Decorative solid surfacing materials —
Part 3:
Determination of properties — Solid surface shapes
SAFETY STATEMENT — Persons using this document should be familiar with normal laboratory
practice, if applicable. This document does not purport to address all of the safety problems, if any,
associated with its use. It is the responsibility of the user to establish appropriate safety and health
practices and to ensure compliance with any regulatory conditions.
1 Scope
This part of ISO 19712 specifies the methods of test for determination of the properties of solid surfacing
materials, as defined in Clause 3, in the form of shaped products. These methods are primarily intended for
testing the materials specified in ISO 19712-1.
The tests may be carried out on finished products, but are generally carried out on test panels of a size
sufficient to meet the requirements of the test, and of the same material and finish as the finished product.
2 Normative references
The following referenced documents are indispensable for the application 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 105-A02, Textiles — Tests for colour fastness — Part A02: Grey scale for assessing change in colour
ISO 105-B02, Textiles — Tests for colour fastness — Part B02: Colour fastness to artificial light: Xenon arc
fading lamp test
ISO 209:2007, Aluminium and aluminium alloys — Chemical composition
ISO 1770, Solid-stem general purpose thermometers
ISO 2039-1, Plastics — Determination of hardness — Part 1: Ball indentation method
ISO 2039-2, Plastics — Determination of hardness — Part 2: Rockwell hardness
ISO 3668, Paints and varnishes — Visual comparison of the colour of paints
ISO 4211:1979, Furniture — Assessment of surface resistance to cold liquids
1)
ISO 4892:1981, Plastics — Methods of exposure to laboratory light sources
ISO 4892-1, Plastics — Methods of exposure to laboratory light sources — Part 1: General guidance
ISO 4892-2:2006, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc sources

1) Withdrawn, but still used in certain Asian countries.
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SIST EN ISO 19712-3:2014
ISO 19712-3:2007(E)
ISO 9370, Plastics — Instrumental determination of radiant exposure in weathering tests — General guidance
and basic test method
CIE Publication No. 85:1989, Solar spectral irradiance
ASTM D 2244, Standard Practice for Calculation of Color Tolerances and Color Differences from
Instrumentally Measured Color Coordinates
ASTM D 2583, Standard Test Method for Indentation Hardness of Rigid Plastics by Means of a Barcol
Impressor
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
solid surfacing material
SSM
material, composed of polymeric materials together with pigments and fillers, intended to be cast into sheets
or shaped products
NOTE 1 The material is of the same composition throughout the whole thickness of the sheet or product.
NOTE 2 Sheets and products made from SSMs are repairable and renewable to the original finish.
NOTE 3 SSMs can also be fabricated into continuous sheets with inconspicuous seams.
4 Cleaning the test specimen surface
4.1 General
The surface to be tested shall be prepared prior to testing using the procedure specified in 4.3.
4.2 Materials
4.2.1 Cellulose sponge.
4.2.2 Non-abrasive cleanser, containing a bleaching agent.
4.2.3 Water.
4.2.4 Clean, absorbent, lint-free material.
4.3 Procedure
Clean the surface using a damp sponge and non-abrasive cleanser containing a bleaching agent, scrubbing
2
the surface with light hand pressure for up to 1,0 min/m . Rinse the prepared surface with water and dry with
clean, absorbent, lint-free material.
5 Surface defects
5.1 Procedure
The entire finished surface of the shaped product under test shall be rubbed with a sponge and a 50 %
solution of tap water and water-soluble black or blue-black ink after the surface has been washed and dried as
described in 4.3. When inspecting coloured sheets, contrasting-coloured ink shall be used. The ink shall be
wiped from the surface with a damp cloth and the surface dried before inspection.
2 © ISO 2007 – All rights reserved

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SIST EN ISO 19712-3:2014
ISO 19712-3:2007(E)
5.2 Method of inspection of surface
After being inked in accordance with 5.1, the surface of the shaped product shall be inspected with the
unaided eye for defects and blemishes from a distance of between 305 mm and 610 mm, using a light source
giving an illumination intensity of (1 615 ± 540) lx near the surface to be inspected.
5.3 Performance requirements
The finished surfaces of shaped products shall be free from cracks, chipped areas, pinholes and blisters.
Spots, dirt and similar surface blemishes are admissible provided the total area covered by such blemishes is
2 2
not more than 1,0 mm /m of the surface of the shaped product. The blemishes may be concentrated in one
place or scattered over the product.
5.4 Test report
The test report shall include the following information:
a) a reference to this part of ISO 19712;
b) the name and type of product;
c) whether the surface was free from cracks, chipped areas, etc.;
2 2
d) whether the area covered by spots, dirt, etc., was more than 1,0 mm /m of sheet surface;
e) any deviation from the method specified;
f) the date of the test.
6 Resistance to impact by large-diameter ball
6.1 Principle
While this test method can be used for any shaped product of suitable size and shape, it is intended
principally for sinks and is therefore written for that particular product.
A sink made of solid surface material is covered with a sheet of carbon paper and subjected to the impact of a
steel ball which is allowed to fall from a known height. The impact resistance is expressed as the maximum
drop height which does not incur visible surface cracking or chipping.
6.2 Test specimen
Sinks to be tested shall be taken from the finished-goods inventory.
6.3 Procedure
A 38,1-mm-diameter, 0,225 kg steel ball shall be dropped from a height of 610 mm to impact once on each of
four different areas in each sink compartment.
Two of these areas shall be on the flat area of the sink bottom, and the other two points shall be on the
convex rim radius.
Service sinks without rolled rims, and other cast products, shall be impacted only on the compartment bottom.
Impact locations for typical sink configurations shall be as shown in Figure 1.
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SIST EN ISO 19712-3:2014
ISO 19712-3:2007(E)
Additionally, the 0,225 kg steel ball shall be dropped to impact once on each of three different points on flat
areas of sinks with tops or integral tops and drainboards.
The sink shall be mounted in accordance with the manufacturer's instructions for normal use.
6.4 Performance requirement
The sink shall not show any cracks or chips after inking and inspection as described in 5.1 and 5.2.
6.5 Test report
The test report shall include the following information:
a) a reference to this part of ISO 19712;
b) the name and type of sink;
c) whether the sink showed any cracks or chips;
d) any deviation from the method specified;
e) the date of the test.

• impact points
Figure 1 — Point-of-impact locations
4 © ISO 2007 – All rights reserved

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SIST EN ISO 19712-3:2014
ISO 19712-3:2007(E)
7 Lightfastness
7.1 Method A
7.1.1 Principle
A specimen taken from the product under test is exposed to daylight simulated by the filtered light of one or
more xenon-arc lamps. The effect on the colour of the specimen, at a specified radiant exposure, is assessed
by the contrast between the exposed and unexposed portions of the test specimen. The radiant exposure is
determined both instrumentally and by assessing the effect on blue wool references which are exposed
simultaneously.
Daylight spectral distribution is specified since SSM products may, in certain applications, be exposed to
direct daylight through open windows.
7.1.2 Apparatus
7.1.2.1 Test device, as specified in ISO 4892-1 and ISO 4892-2, equipped with:
a) one or more xenon-arc lamps, filtered to provide a spectral energy distribution which closely
approximates to that of solar irradiance as described in CIE Publication No. 85:1989, Table 4, and
ISO 4892-2:2006, Table 1 (method A);
b) stainless-steel specimen holders, in the form of an open frame, which provide the test specimens with a
solid backing;
c) a black-standard thermometer as specified in ISO 4892-1;
d) a photoelectronic sensor (radiometer) of one of the types specified in ISO 9370 to measure the irradiance
and the radiant exposure at the specimen surface in the wavelength range 300 nm to 400 nm, or at
340 nm.
7.1.2.2 Viewing enclosure, having a matt interior colour corresponding approximately to Munsell N5. It
shall be equipped with an artificial light source, located at the top, simulating average north sky daylight (e.g.
tungsten-halogen incandescent lamps) and generating a colour temperature of (6 500 ± 200) K and at least
800 lx at the surface of the specimen. The viewing enclosure shall be placed in a position where the
surrounding lighting conditions will not affect the visual assessment of the specimen.
7.1.3 Test specimen
One test specimen shall be prepared, of a size suitable for the specimen holder used and appropriate for the
method of assessment after exposure.
7.1.4 Procedure
The test specimen and a set of blue wool references 5, 6 and 7 (as specified in ISO 105-B02) shall be
exposed simultaneously. Blue wool references 5 and 7 are included to provide confirmation that wool
reference 6 has degraded to the specified degree of contrast.
Using opaque stainless-steel covers, shield approximately one-half of both the test specimen and the set of
blue wool references.
Carry out the test in accordance with ISO 4892-2 under the following operating conditions:
2
a) irradiance at the test specimen surface in the wavelength range 300 nm to 400 nm: (60 ± 3) W/m ; or at
2
wavelength 340 nm: (0,5 ± 0,03) W/m ;
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SIST EN ISO 19712-3:2014
ISO 19712-3:2007(E)
b) black-standard temperature: (65 ± 3) °C;
c) relative humidity: (50 ± 5) %.
Discontinue the exposure when the contrast between the exposed and unexposed portions of blue wool
reference 6 is equal to grade 4 on the grey scale, as defined in ISO 105-A02 (see Note 1).
Measure and record the radiant exposure (over 300 nm to 400 nm, or at 340 nm).
Remove the test specimen from the apparatus, take off the cover, and leave the specimen for (24 ± 2) h in
dark conditions to prevent extraneous darkening and/or photochromism (see Note 2).
NOTE 1 Although the use of blue wool references is no longer the preferred method of measuring radiant exposure,
the method is still in common use and is therefore permitted. Once sufficient data have been collected, the end-point of
the test will be defined by the level of radiant exposure.
NOTE 2 Extraneous darkening and/or photochromism are due to the shock effect of accelerated exposure, and are not
characteristics of natural exposure. Keeping the specimens in dark conditions for 24 h allows recovery from these effects.
7.1.5 Assessment of specimen and expression of results
Place the test specimen in the viewing enclosure (7.1.2.2).
Examine the surface of the test specimen with the naked eye, corrected if necessary, at a distance of
approximately 500 mm for any change in colour, assessing the contrast between the exposed and unexposed
portions of the test specimen in terms of a grade on the grey scale in accordance with ISO 105-A02.
The lightfastness of the test specimen is expressed in terms of the contrast being greater than, equal to or
less than grade 4 on the grey scale.
7.1.6 Test report
The test report shall include the following information:
a) a reference to this part of ISO 19712;
b) the name, type and nominal thickness of the product;
c) details of the apparatus used;
d) the irradiance at the test specimen surface;
e) the radiant exposure;
f) the exposure time;
g) the lightfastness of the specimen;
h) any deviation from the method specified;
i) the date of the test.
7.2 Method B
7.2.1 Principle
The test assesses the effect on the colour of a test specimen of exposure to a filtered xenon-arc light source
having a frequency range simulating sunlight through window glass.
It is not intended to show the resistance to continuous exposure to outdoor weathering conditions.
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SIST EN ISO 19712-3:2014
ISO 19712-3:2007(E)
7.2.2 Materials
7.2.2.1 White petroleum jelly.
7.2.3 Apparatus
7.2.3.1 Suitable xenon-arc test apparatus, as specified in ISO 4892-1 and ISO 4892-2, capable of
providing radiant energy closely simulating sunlight, with a spectral passband of 280 nm to 800 nm and with
appropriate filtering to simulate daylight through window glass. The apparatus shall incorporate a system for
mounting specimen holders at an equal radial distance from the centre of the light source and revolving them
around the light source so as to provide equal radiant exposure.
7.2.3.2 Specimen holders, suitable for the test apparatus, and incorporating a mask to cover half of the
exposed face of the test specimen.
7.2.3.3 Overhead white fluorescent lights, with bulb(s) positioned parallel to the line of sight and
providing an intensity of 800 lx to 1 100 lx at the specimen surface.
7.2.4 Standardization of apparatus
Calibration, maintenance and filter changes shall be strictly in accordance with the equipment manufacturer's
recommendations.
The calibration wavelength for the xenon unit shall be 420 nm.
7.2.5 Test specimens
The test specimens shall be of the size specified for the test apparatus being used. The longest dimension of
the specimens shall be in the machine direction of the product.
7.2.6 Procedure
Mount each test specimen in a specimen holder (7.2.3.2) so that approximately one-half of the specimen is
exposed to the light source, the other half being covered by the mask. Fill all the specimen holders, utilizing
blanks if necessary, and keep them filled during the whole of the test in order to maintain correct airflow
conditions through the test chamber.
Carry out the test under the operating conditions specified in Table 1.
NOTE The setting of the wet-bulb temperature in relation to the dry-bulb temperature is designed to maintain a
relative humidity of (50 ± 5) %.
All test parameters shall be maintained as close as possible to the required settings.
Table 1 — Operating conditions
Parameter Setting Tolerance
2 2
Total irradiance 279,0 kJ/m ± 2,0 kJ/m
2 2
Irradiance level 1,10 W/m ± 0,03 W/m
Black-panel temperature 70 °C ± 3 °C
Dry-bulb temperature 50 °C ± 3 °C
Wet-bulb temperature 39 °C ± 1 °C
Conditioning-water temperature 20 °C ± 3 °C
Duration of exposure 72 h ± 1 %
Power adjustment Automatic To maintain steady irradiance levels, allowing for
ageing of xenon burners and solarization of filters
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SIST EN ISO 19712-3:2014
ISO 19712-3:2007(E)
The black-panel thermometer shall be mounted at the same distance from the light source as the test
specimen. The black coating shall be maintained in good condition in order to achieve as accurately as
possible the black-body temperature of the panel.
At the conclusion of the specified exposure period, remove the test specimens from their holders and allow
them to condition at room temperature for a period of 24 h.
After this conditioning period, examine each specimen within 4 h by placing the specimen on a horizontal
surface under the inspection lights (7.2.3.3) and viewing it at an eye-to-specimen distance of 750 mm to
900 mm, and at an angle of 45° to 75° from the horizontal plane. Rotate the specimen on the horizontal
surface and view it from all directions. Direct sunlight or other light sources which might accentuate or
minimize the visual effect shall be avoided.
If a difference in appearance is evident between the exposed and unexposed areas of the test specimen, coat
the surface of the specimen with a thin film of white petroleum jelly (7.2.2.1) and re-examine it. If the
difference persists, report the difference as a colour change; if it disappears, report it as a change in surface
finish.
7.2.7 Expression of results
Express the result of the examination in accordance with the following rating scale:
Rating 5: No change in colour or surface finish
Rating 4: A slight change in colour or surface finish visible only at certain viewing angles and
directions
Rating 3: A moderate change in colour or surface finish that is just visible at all viewing angles and
directions
Rating 2: A marked change in colour or surface finish that is very evident at all viewing angles and
directions
Rating 1: S
...

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