The cleaning of silver objects with a basic solution of sodium glycinate: a study on artificially and naturally tarnished silver

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dc.creatorJoão Cura D'Ars de Figueiredo Junior
dc.creatorSamara Santos Asevedo
dc.creatorMaria Luiza Seixas de Souza e Silva
dc.creatorAndrezza Conde Araújo
dc.creatorMaria Regina Emery Quites
dc.date.accessioned2025-04-03T16:40:12Z
dc.date.accessioned2025-09-08T23:29:09Z
dc.date.available2025-04-03T16:40:12Z
dc.date.issued2021
dc.format.mimetypepdf
dc.identifier.doihttps://doi.org/10.1080/00393630.2020.1859876
dc.identifier.issn2047-0584
dc.identifier.urihttps://hdl.handle.net/1843/81278
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofStudies in conservation
dc.rightsAcesso Restrito
dc.subjectPrata - Conservação e restauração
dc.subjectMetais preciosos
dc.subjectArte - Conservação e restauração
dc.subject.otherSilver cleaning
dc.subject.otherSilver tarnish layers
dc.subject.otherSodium glycinate
dc.subject.otherScanning electron microscopy
dc.subject.otherX-ray fluorescence
dc.titleThe cleaning of silver objects with a basic solution of sodium glycinate: a study on artificially and naturally tarnished silver
dc.typeArtigo de periódico
local.citation.epage383
local.citation.issue7
local.citation.spage375
local.citation.volume66
local.description.resumoThe appearance of silver objects deteriorates due to the formation of a brown-to-black tarnish layer. Several methods are available for removing these tarnished layers, ranging from polishing through chemical cleaning to electrochemical methods. This study presents a lowcost and low-toxicity method that uses sodium glycinate to clean silver. Cleaning tests were performed on both artificially tarnished prototypes and naturally tarnished objects after characterizing them; scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDX) were used to characterize the artificially tarnished prototypes, and X-ray fluorescence (XRF) was used to characterize the naturally tarnished objects. The aggressiveness of the baths was analyzed by measuring the leached amount obtained through atomic absorption spectroscopy (AAS) and SEM. The procedures used for cleaning the artificially tarnished prototypes served as a guide for cleaning two naturally tarnished objects: a halo and a crown. Cleaning was guided by the presented method’s characteristics as well as the object’s unique characteristics and condition.
local.identifier.orcidhttps://orcid.org/0000-0002-4901-1005
local.identifier.orcidhttps://orcid.org/0000-0002-0354-3153
local.identifier.orcidhttps://orcid.org/0000-0002-6736-1762
local.publisher.countryBrasil
local.publisher.departmentEBA - DEPARTAMENTO DE ARTES PLÁSTICAS
local.publisher.initialsUFMG

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