EN 17488:2021
(Main)Conservation of cultural heritage - Procedure for the analytical evaluation to select cleaning methods for porous inorganic materials used in cultural heritage
Conservation of cultural heritage - Procedure for the analytical evaluation to select cleaning methods for porous inorganic materials used in cultural heritage
This document gives the test methodology for evaluation of both harmfulness and effectiveness of a cleaning method as applied to porous inorganic materials. Mural paintings and polychromy are excluded.
Evaluation includes the use of on-site analyses and/or laboratory studies.
The evaluation of the potential harm has a higher priority than the effectiveness in order to prevent overcleaning. It is important that cleaning is always at the minimum level deemed effective and that it respects the original surface and finishes. Overcleaning is a term used to indicate that irreversible damage has been done by the unnecessary removal of materials, which are part of the value of the object.
This document applies to:
a) Part A: all methods of cleaning, which have characteristics of parameterization and reproducibility (see EN 17138).
b) Part B: all new methods that are under development.
This document applies to evaluate the optimum methods for cleaning and the optimization of the parameters of the selected cleaning process.
Erhaltung des kulturellen Erbes — Methodologie für die analytische Prüfung zur Auswahl von Reinigungsverfahren von porösen anorganischen Objekten des kulturellen Erbes
Dieses Dokument enthält das Prüfverfahren zur Bewertung der Schädlichkeit sowie der Wirksamkeit eines Reinigungsverfahrens, das auf porösen anorganischen Materialien angewendet wird. Wandmalereien und Polychromie sind hiervon ausgenommen.
Die Bewertung umfasst die Durchführung von Analysen vor Ort und/oder Untersuchungen im Labor.
Die Bewertung des möglichen Schadens hat eine höhere Priorität als die Wirksamkeit, um eine Überreinigung zu vermeiden. Es ist wichtig, dass die Reinigung stets auf dem niedrigsten Niveau erfolgt, das als wirksam erachtet wird, und dass sie unter Berücksichtigung der ursprünglichen Oberfläche und Beschichtungen erfolgt. Überreinigung ist ein Begriff, der darauf hinweist, dass durch die unnötige Entfernung von Materialien, die zum Wert des Objekts beitragen, irreversible Schäden entstanden sind.
Dieses Dokument gilt für:
a) Teil A: alle Reinigungsverfahren, die Merkmale der Parametrisierung und Reproduzierbarkeit aufweisen (siehe EN 17138);
b) Teil B: alle neuartigen Verfahren, die sich in der Entwicklung befinden.
Dieses Dokument dient der Bewertung der optimalen Reinigungsverfahren und der Optimierung der Parameter von ausgewählten Reinigungsprozessen.
Conservation du patrimoine culturel - Procédure pour l'évaluation analytique et le choix des méthodes de nettoyage des matériaux inorganiques poreux dans les bâtiments d'intérêt patrimonial
Le présent document présente la méthodologie d'essai utilisée pour l'évaluation de la dangerosité et de l'efficacité d'une méthode de nettoyage appliquée aux matériaux inorganiques poreux. Les peintures murales et la polychromie sont exclues.
L'évaluation inclut l'utilisation d'analyses sur site et/ou d'études en laboratoire.
Afin d'éviter tout nettoyage excessif, l'évaluation du dommage potentiel est prioritaire sur l'efficacité. Il est important que le nettoyage soit effectué au niveau minimal jugé efficace et qu'il respecte la surface d'origine et les couches de finition. Le nettoyage excessif est un terme utilisé pour indiquer qu'un dommage irréversible a été causé par l'élimination non nécessaire de matériaux constitutifs de la valeur du bien.
Le présent document s'applique à :
a) Partie A : toutes les méthodes de nettoyage présentant des caractéristiques de paramétrage et de reproductibilité (voir l'EN 17138) ;
b) Partie B : toutes les nouvelles méthodes en cours de développement.
Le présent document s'applique à l'évaluation des meilleures méthodes de nettoyage ainsi que l'optimisation des paramètres du processus de nettoyage choisi.
Ohranjanje kulturne dediščine - Postopek za analitično vrednotenje pri izbiri metod za čiščenje poroznih anorganskih materialov, uporabljenih pri tej kulturni dediščini
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2021
Ohranjanje kulturne dediščine - Postopek za analitično vrednotenje pri izbiri
metod za čiščenje poroznih anorganskih materialov, uporabljenih pri tej kulturni
dediščini
Conservation of cultural heritage - Procedure for the analytical evaluation to select
cleaning methods for porous inorganic materials used in cultural heritage
Erhaltung des kulturellen Erbes - Methodologie für die analytische Prüfung zur Auswahl
von Reinigungsverfahren von porösen anorganischen Objekten des kulturellen Erbes
Conservation du patrimoine culturel - Procédure pour l'évaluation analytique et le choix
des méthodes de nettoyage des matériaux inorganiques poreux dans les bâtiments
d'intérêt patrimonial
Ta slovenski standard je istoveten z: EN 17488:2021
ICS:
97.195 Umetniški in obrtniški izdelki. Items of art and handicrafts.
Kulturne dobrine in kulturna Cultural property and
dediščina heritage
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 17488
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2021
EUROPÄISCHE NORM
ICS 97.195
English Version
Conservation of cultural heritage - Procedure for the
analytical evaluation to select cleaning methods for porous
inorganic materials used in cultural heritage
Conservation du patrimoine culturel - Procédure pour Erhaltung des kulturellen Erbes - Methodologie für die
l'évaluation analytique et le choix des méthodes de analytische Prüfung zur Auswahl von
nettoyage des matériaux inorganiques poreux dans les Reinigungsverfahren von porösen anorganischen
bâtiments d'intérêt patrimonial Objekten des kulturellen Erbes
This European Standard was approved by CEN on 23 May 2021.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17488:2021 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Abbrevations. 9
5 General procedure (Part A) . 9
5.1 Overview . 9
5.2 Identification of substrate and characterization of unwanted materials. 10
5.3 Selection of suitable cleaning methods to be tested . 11
5.4 Localization, delimitation and numbering of the cleaning trial areas . 11
5.5 Design of the evaluation procedure and definition of a referenced cleaned area . 12
6 On site surface investigations . 15
6.1 Optical observation . 15
6.1.1 Portable digital microscope . 15
6.1.2 Raking light . 15
6.1.3 Portable digital stereo microscope . 15
6.1.4 Fluorescence induced by UV radiation . 15
6.2 Chemical/physical analysis . 16
6.2.1 Measurement of colour . 16
6.2.2 Elemental analysis by portable XRF . 16
6.2.3 Molecular analysis by portable FTIR . 16
6.2.4 Surface ion analysis . 16
6.3 Water absorption assessment . 17
6.3.1 General . 17
6.3.2 Determination of water absorption by pipe method (in situ) . 17
6.3.3 Determination of water absorption by contact sponge method (in situ) . 17
6.3.4 Water drop test (in situ) . 17
7 Laboratory analysis on samples taken from trial areas . 18
7.1 General . 18
7.2 Sampling . 18
7.3 Chemical/physical analysis . 19
7.3.1 Examinations of fragments surfaces by TLOM, RLOM, SEM/ESEM and EDS
microanalysis . 19
7.3.2 Examinations of thin and polished and cross section by TLOM, RLOM, SEM/ESEM and
EDS microanalysis . 20
7.3.3 Vibrational spectroscopy (FTIR, micro-FTIR and Raman) . 20
7.4 Surface morphology analysis . 20
7.4.1 Measurement of roughness (see ISO 25178) . 20
7.5 Wet chemical analysis (on aqueous extract) in the case of chemical cleaning . 21
7.5.1 Extraction procedure . 21
7.5.2 Analysis on aqueous extract . 23
8 Overall evaluation of results obtained . 23
9 Analytical procedure for testing methods under development on specimens of
analogous material (Part B). 24
9.1 General procedure . 24
9.2 Preparation of test specimens . 26
9.2.1 Number and dimensions of test specimens . 26
9.2.2 Pre-conditioning of test specimens . 27
9.3 Evaluation process of the cleaning method(s) under test . 27
9.4 Test analysis on specimens before and after the application of cleaning methods . 27
9.4.1 General . 27
9.4.2 Determination of water absorption by capillarity . 27
9.4.3 Colour measurement of surfaces . 28
9.4.4 Observation of the surfaces by the stereo microscope . 28
9.4.5 Determination of mass variation . 28
9.4.6 Thin and polished cross sections analysis by TLOM, RLOM, SEM/ESEM-EDS . 28
9.4.7 Thin and polished cross sections analysis by TLOM, RLOM, SEM/ESEM-EDS on
fragments of surfaces . 29
9.4.8 Cleaning application . 29
9.5 Analysis of aqueous extract for chemical cleaning . 30
9.6 Test report . 30
9.6.1 General information . 30
9.6.2 Results of measurements on specimens . 30
Annex A (normative) Examples of trial applications . 33
Annex B (informative) Test carried out, findings, inference . 38
Annex C (informative) Specifications to be reported for different cleaning methods (see
EN 17138:2018) . 48
Bibliography . 52
European foreword
This document (EN 17488:2021) has been prepared by Technical Committee CEN/TC 346 “Conservation
of Cultural Heritage”, 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 December 2021, and conflicting national standards shall
be withdrawn at the latest by December 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN 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, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United
Kingdom.
Introduction
Cleaning is the removal of unwanted material from an object surface or near-surface.
A cultural heritage object is irrep
...
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