SIST EN 15886:2010
(Main)Conservation of cultural property - Test methods - Colour measurement of surfaces
Conservation of cultural property - Test methods - Colour measurement of surfaces
This European Standard describes a test method to measure the surface colour of porous inorganic materials, and their possible chromatic changes. No reference to the appearance of glossy surfaces is described. The method may be applied to porous inorganic materials either untreated or subjected to any treatment or ageing. The method is suitable for the measurement of colour coordinates of:
- representative surfaces of specimens, see 3.11;
- representative surfaces of objects, indoors or outdoors.
Erhaltung des kulturellen Erbes - Prüfmethoden - Farbmessung von matten Oberflächen
Diese Europäische Norm beschreibt ein Prüfverfahren zur Farbmessung auf Oberflächen von porösen anorganischen Materialien und deren möglichen Farbänderungen. Es wird kein Verweis auf das Auftreten von Glanz beschrieben. Das Verfahren kann auf poröse anorganische Materialien, entweder unbehandelt oder durch Behandlung oder natürliche Alterung beansprucht, angewendet werden. Das Verfahren ist für die In-situ-Messung der Farbkoordinaten von Kunstwerken in Innenräumen oder im Freien geeignet.
Conservation des biens culturels - Méthodes d'essai - Mesurage chromatique des surfaces
La présente Norme européenne décrit une méthode d’essai permettant de mesurer la couleur de surface des matériaux inorganiques poreux, et leurs possibles modifications chromatiques. Il n’est pas fait référence à l’aspect brillant. La méthode peut être appliquée aux matériaux inorganiques poreux, traités ou non traités, ou soumis au vieillissement naturel. Cette méthode permet de mesurer in situ les coordonnées colorimétriques d’ouvrages situés en intérieur ou en extérieur.
Ohranjanje kulturne dediščine - Preskusne metode - Barvno merjenje površin
Ta evropski standard opisuje preskusno metodo za merjenje barve za površine poroznih neorganskih materialov in njihovih mogočih kromatičnih sprememb. Opisano ni nobeno sklicevanje na videz gladkih površin. Metoda se lahko uporablja za porozne neorganske materiale, ki niso obdelani, in tiste, ki so zavezani kakršni koli obdelavi ali staranju. Metoda je primerna za merjenje barvnih koordinat:
- tipičnih površin primerkov, glej točko 3.11;
- tipičnih površin predmetov, v zaprtih prostorih in zunaj njih.
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Erhaltung des kulturellen Erbes - Prüfmethoden - Farbmessung von matten OberflächenConservation des biens culturels - Méthodes d'essai - Mesurage chromatique des surfacesConservation of cultural property - Test methods - Colour measurement of surfaces97.195Umetniški in obrtniški izdelkiItems of art and handicrafts17.040.20Lastnosti površinProperties of surfacesICS:Ta slovenski standard je istoveten z:EN 15886:2010SIST EN 15886:2010en,fr01-december-2010SIST EN 15886:2010SLOVENSKI
STANDARD
SIST EN 15886:2010
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15886
September 2010 ICS 97.195 English Version
Conservation of cultural property - Test methods - Colour measurement of surfaces
Conservation des biens culturels - Méthodes d'essai - Mesurage chromatique des surfaces
Erhaltung des kulturellen Erbes - Prüfmethoden - Farbmessung von matten Oberflächen This European Standard was approved by CEN on 7 August 2010.
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 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 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15886:2010: ESIST EN 15886:2010
EN 15886:2010 (E) 2 Contents Page Foreword .31 Scope .42 Normative references .43 Terms and definitions .44 Principle .65 Test equipment .65.1 General .65.2 White object colour stimulus .66 Colour measurement of specimens .76.1 Test areas of specimens .76.2 Number of specimens .76.3 Preparation of specimens .77 Colour measurement of indoor and outdoor objects .78 Test method .78.1 General .78.2 Measuring area and number of measurements .88.3 Reproducibility of measurements .89 Calculation and interpretation of results .89.1 CIELAB values .89.2 Calculation of total colour differences .89.3 Recommended options .810 Test report .9Bibliography . 11 SIST EN 15886:2010
EN 15886:2010 (E) 3 Foreword This document (EN 15886:2010) has been prepared by Technical Committee CEN/TC 346 “Conservation of cultural property”, the secretariat of which is held by UNI. 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 March 2011, and conflicting national standards shall be withdrawn at the latest by March 2011. 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 organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. SIST EN 15886:2010
EN 15886:2010 (E) 4 1 Scope This European Standard describes a test method to measure the surface colour of porous inorganic materials, and their possible chromatic changes. No reference to the appearance of glossy surfaces is described. The method may be applied to porous inorganic materials either untreated or subjected to any treatment or ageing.
The method is suitable for the measurement of colour coordinates of: representative surfaces of specimens, see 3.11; representative surfaces of objects, indoors or outdoors. 2 Normative references The following referenced documents are required for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced documents (including any amendments) apply. prEN 15898:2010, Conservation of cultural property
Main general terms and definitions concerning conservation of cultural property 3 Terms and definitions For the purposes of this document, the terms and definitions given in prEN 15898:2010 and the following apply. 3.1 porous inorganic materials natural stones as well as artificial materials such as mortar, plaster, brick and others 3.2 chroma attribute of colour used to indicate the degree of departure of the colour from a grey of the same lightness
NOTE See ASTM E 284. 3.3 lightness
attribute by which a perceived colour is judged to be equivalent to one of a series of greys ranging from black to white
NOTE See ASTM E 284. 3.4 hue
attribute of a visual perception according to which an area appears to be similar to one of the colours, red, yellow, green, and blue, or to a combination of adjacent pairs of these colours considered in a closed ring
NOTE See the International Commission on Illumination CIE (1931) 3.5 reflectance factor
R% percentage ratio of the reflected radiant power compared to incident radiant power SIST EN 15886:2010
EN 15886:2010 (E) 5 3.6 CIE standard illuminant D65 reference illuminant having approximately the same relative spectral power distribution of a phase of daylight with a correlated colour temperature of approximately 6 500 K 3.7 CIE XYZ trichromatic system system for colour measurement established in 1931 by the International Commission on Illumination CIE (1931)
NOTE The interpretation of numerical data is connected directly to visual perception. It is based on the principle that colours are obtained by mixing together the three imaginary colour as primaries defined X, Y, Z. These primaries define the reference frame in the tristimulus space and any set (X,Y,Z) is a vector in this space. The principal property of the reference frame is that the Y component is the luminance factor, generally given on a percentage scale.
3.8 CIE 1931 standard colorimetric observer average observer whose colour matching properties correspond to the CIE colour matching functions for the 2° field size 3.9 CIE 1964 standard colorimetric observer average observer whose colour matching properties correspond to the CIE colour matching functions for the 10° field size 3.10 CIE L*a*b* colour space 1976 mathematical transformation of the CIE XYZ space into a metric space
NOTE 1 See Figure 1.
NOTE 2 The L*a*b* system is useful for calculations of colour differences because it allows them to be defined by numerical values. NOTE 3 In the CIE L*a*b* colour space the colour coordinates in this rectangular coordinate system are:
L* - the lightness coordinate. The scale for L* ranges from 0 (black) to 100 (white); a* - the red/green coordinate, with +a* indicating redness and -a* indicating greenness; b* - the yellow/blue coordinate with +b* indicating yellowness and -b* indicating blueness.
a*b*L*f Figure 1 — L*a*b* colour space SIST EN 15886:2010
EN 15886:2010 (E) 6
3.11
specimen part considered representative of the material constituting an object.
NOTE 1 The specimen can have different origins and can be taken from: materials similar to those constituting the object under study (e.g. stone quarries); reference materials, for instance, specifically prepared compa
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SLOVENSKI STANDARD
oSIST prEN 15886:2009
01-februar-2009
9DUVWYRNXOWXUQHGHGLãþLQH3UHVNXVQHPHWRGH%DUYQRPHUMHQMHSRYUãLQ
Conservation of cultural property - Test methods - Colour measurement of surfaces
Erhaltung des kulturellen Erbes - Prüfmethoden - Farbmessung von matten Oberflächen
Conservation des biens culturels - Méthodes d'essai - Mesurage chromatique des
surfaces
Ta slovenski standard je istoveten z: prEN 15886
ICS:
97.195 Umetniški in obrtniški izdelki Items of art and handicrafts
oSIST prEN 15886:2009 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 15886:2009
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oSIST prEN 15886:2009
EUROPEAN STANDARD
DRAFT
prEN 15886
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2008
ICS 97.195
English Version
Conservation of cultural property - Test methods - Colour
measurement of surfaces
Conservation des biens culturels - Méthodes d'essai - Erhaltung des kulturellen Erbes - Prüfmethoden -
Mesurage chromatique des surfaces Farbmessung von matten Oberflächen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 346.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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 Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15886:2008: E
worldwide for CEN national Members.
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oSIST prEN 15886:2009
prEN 15886:2008 (E)
Contents Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Terms and definitions .4
4 Principle .6
5 Test equipment .6
5.1 General .6
5.2 White object colour stimulus .6
6 Colour measurement of specimens .6
6.1 Test areas .6
6.2 Number of specimens .6
6.3 Preparation .6
7 Colour measurements of indoor and outdoor object .6
7.1 General .6
7.2 Measurement of indoor objects .6
7.3 Measurement outdoor objects .7
8 Test method .7
8.1 General .7
8.2 Measuring field and readings .7
8.3 Reproducibility of measurements .7
9 Calculations and interpretations of results .7
9.1 Calculations .7
9.1.1 CIELAB values .7
9.1.2 Calculation of total colour differences .8
10 Test report .9
Bibliography . 10
2
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oSIST prEN 15886:2009
prEN 15886:2008 (E)
Foreword
This document (prEN 15886) has been prepared by Technical Committee CEN/TC 346 “Conservation of
cultural property”, the secretariat of which is held by UNI.
This document is currently submitted to the CEN Enquiry.
3
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oSIST prEN 15886:2009
prEN 15886:2008 (E)
1 Scope
This European standard describes a test method to measure the surface colour of porous inorganic materials,
and their possible chromatic changes. No reference to the appearance of glossy is described. The method
may be applied to porous inorganic materials either untreated or subjected to any treatment or natural ageing.
The method is suitable for in-situ measurement of colour coordinates of works of art located indoors or
outdoors.
2 Normative references
The following referenced documents are required for the application of this standard. For dated references,
only the edition cited applies. For undated references, the latest edition of the referenced document
(including any amendments) applies.
WI00346002 Conservation of cultural property - Main general terms and definitions concerning conservation
of cultural property
3 Terms and definitions
For the purposes of this document, the terms and definitions given in WI00346002 and the following apply.
3.1
porous inorganic materials
they include natural stones as well as artificial materials, such as mortar, plaster, brick and others
3.2
treatment
any intervention that potentially changes the characteristics of the material under study such as cleaning,
consolidation, protection or artificial ageing
3.3
chroma
attribute of colour used to indicate the degree of departure of the colour from a grey of the same lightness
(according to ASTM E 284)
3.4
lightness
attribute by which a perceived colour is judged to be equivalent to one of a series of greys ranging from black
to white (according to ASTM E 284)
3.5
hue
attribute of a visual perception according to which an area appears to be similar to one of the colors, red,
yellow, green, and blue, or to a combination of adjacent pairs of these colors considered in a closed ring
(according to CIE)
3.6
reflectance factor (R%)
percentage ratio of the reflected radiant power compared to incident radiant power
3.7
CIE standard illuminant D65
reference illuminant having approximately the same relative spectral power distribution as a phase of daylight
with a correlated colour temperature of approximately 6500 K
4
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oSIST prEN 15886:2009
prEN 15886:2008 (E)
If a different reference illuminant is used (i.e. illuminant C or A), it shall be indicated in the test report (see
clause 10).
3.8
CIE XYZ trichromatic system
system for colour measurement established in 1931 by the Commission Internationale de l’Eclairage CIE
(1931). The interpretation of numerical data is connected directly to visual perception. It is based on the
principle that colours are obtained by mixing together the three colour imaginary primaries defined X, Y, Z.
These primaries define the reference frame in the tristimulus space and any set (X,Y,Z) is a vector in this
space. Principal property of the reference frame is that the Y component is the luminance factor, generally
given on percentage scale.
3.9
CIE 1931 standard colorimetric observer
an average observer whose colour matching properties correspond to the CIE colour matching functions for
the 2° field size.
...
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