EN 15886:2010

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 den Oberflächen von porösen anorganischen Materialien und deren möglichen Farbänderungen. Die Norm gilt nicht für glänzende Oberflächen. Das Verfahren kann auf poröse anorganische Materialien, entweder un¬behandelt, behandelt oder gealtert sind, angewendet werden.
Das Verfahren eignet sich für die Messung der Farbkoordinaten von:
-   repräsentativen Oberflächen von Probekörpern, siehe 3.11;
-   repräsentativen Oberflächen von Objekten in Innenräumen oder im Freien.

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 des surfaces. La méthode peut être appliquée aux matériaux inorganiques poreux, traités ou non traités, ou soumis au vieillissement.
La méthode permet de mesurer les coordonnées colorimétriques :
-   des surfaces représentatives d’éprouvettes, voir 3.11 ;
-               des surfaces représentatives d’objets, 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

• Status: Published
• Publication Date: 14-Sep-2010
• ICS: 97.195 - Items of art and handicrafts. Cultural property and heritage
• Technical Committee: CEN/TC 346 - Conservation of cultural property
• Drafting Committee: CEN/TC 346/WG 3 - Evaluation of methods and products for conservation works
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Completion Date: 18-Nov-2020
• Ref Project: SIST EN 15886:2010 - Conservation of cultural property - Test methods - Colour measurement of surfaces

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
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

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

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

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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