Quantitative colour analyses using digital specification technique for Mármore Bege Bahia, a representative Brazilian ornamental limestone of breccia-like texture
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | REM. Revista Escola de Minas (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672005000200004 |
Resumo: | The authors have performed based on digital quantitative colour specification in whole rock and spots using a scanner, a computer, and original colour analysing software Wilbur for Mármore Bege Bahia, an ornamental limestone of breccia-like texture exploited in the centre-north region of Bahia, Brazil. The rock is characterised by light (B=83.4), vivid (S=10.8), and relatively homogeneous (sigma(H)=3.9; sigma(B)=6.5) yellow, tending slightly to orange (H=35.8). The whole rock colour variation is limited to within 10% in brightness, and the colours plotted on the SB (saturation-brightness) diagram constitute a linear trend, with a declination rate of -1.6. This phenomenon is common in minerals with highly developed cleavage and attributed to random reflection on rock surface and subsurface reflection in the mineral interior of calcite. The rock blocks extracted from the quarries commonly have a large number of cavities and the resin-fill technique is frequently applied. It is recommended that the resin colours be adjusted adequately according to the above-mentioned linear trend in order to make the patched limestone visually appear as the natural one. |
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Quantitative colour analyses using digital specification technique for Mármore Bege Bahia, a representative Brazilian ornamental limestone of breccia-like textureMármore Bege Bahiacolour specificationHSBWilburFLDThe authors have performed based on digital quantitative colour specification in whole rock and spots using a scanner, a computer, and original colour analysing software Wilbur for Mármore Bege Bahia, an ornamental limestone of breccia-like texture exploited in the centre-north region of Bahia, Brazil. The rock is characterised by light (B=83.4), vivid (S=10.8), and relatively homogeneous (sigma(H)=3.9; sigma(B)=6.5) yellow, tending slightly to orange (H=35.8). The whole rock colour variation is limited to within 10% in brightness, and the colours plotted on the SB (saturation-brightness) diagram constitute a linear trend, with a declination rate of -1.6. This phenomenon is common in minerals with highly developed cleavage and attributed to random reflection on rock surface and subsurface reflection in the mineral interior of calcite. The rock blocks extracted from the quarries commonly have a large number of cavities and the resin-fill technique is frequently applied. It is recommended that the resin colours be adjusted adequately according to the above-mentioned linear trend in order to make the patched limestone visually appear as the natural one.Escola de Minas2005-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672005000200004Rem: Revista Escola de Minas v.58 n.2 2005reponame:REM. Revista Escola de Minas (Online)instname:Escola de Minasinstacron:ESCOLA DE MINAS10.1590/S0370-44672005000200004info:eu-repo/semantics/openAccessMotoki,AkihisaNeves,José Luíz PeixotoVargas,Thaiseng2005-07-30T00:00:00Zoai:scielo:S0370-44672005000200004Revistahttp://www.scielo.br/remhttps://old.scielo.br/oai/scielo-oai.phpeditor@rem.com.br1807-03530370-4467opendoar:2005-07-30T00:00REM. Revista Escola de Minas (Online) - Escola de Minasfalse |
dc.title.none.fl_str_mv |
Quantitative colour analyses using digital specification technique for Mármore Bege Bahia, a representative Brazilian ornamental limestone of breccia-like texture |
title |
Quantitative colour analyses using digital specification technique for Mármore Bege Bahia, a representative Brazilian ornamental limestone of breccia-like texture |
spellingShingle |
Quantitative colour analyses using digital specification technique for Mármore Bege Bahia, a representative Brazilian ornamental limestone of breccia-like texture Motoki,Akihisa Mármore Bege Bahia colour specification HSB Wilbur FLD |
title_short |
Quantitative colour analyses using digital specification technique for Mármore Bege Bahia, a representative Brazilian ornamental limestone of breccia-like texture |
title_full |
Quantitative colour analyses using digital specification technique for Mármore Bege Bahia, a representative Brazilian ornamental limestone of breccia-like texture |
title_fullStr |
Quantitative colour analyses using digital specification technique for Mármore Bege Bahia, a representative Brazilian ornamental limestone of breccia-like texture |
title_full_unstemmed |
Quantitative colour analyses using digital specification technique for Mármore Bege Bahia, a representative Brazilian ornamental limestone of breccia-like texture |
title_sort |
Quantitative colour analyses using digital specification technique for Mármore Bege Bahia, a representative Brazilian ornamental limestone of breccia-like texture |
author |
Motoki,Akihisa |
author_facet |
Motoki,Akihisa Neves,José Luíz Peixoto Vargas,Thais |
author_role |
author |
author2 |
Neves,José Luíz Peixoto Vargas,Thais |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Motoki,Akihisa Neves,José Luíz Peixoto Vargas,Thais |
dc.subject.por.fl_str_mv |
Mármore Bege Bahia colour specification HSB Wilbur FLD |
topic |
Mármore Bege Bahia colour specification HSB Wilbur FLD |
description |
The authors have performed based on digital quantitative colour specification in whole rock and spots using a scanner, a computer, and original colour analysing software Wilbur for Mármore Bege Bahia, an ornamental limestone of breccia-like texture exploited in the centre-north region of Bahia, Brazil. The rock is characterised by light (B=83.4), vivid (S=10.8), and relatively homogeneous (sigma(H)=3.9; sigma(B)=6.5) yellow, tending slightly to orange (H=35.8). The whole rock colour variation is limited to within 10% in brightness, and the colours plotted on the SB (saturation-brightness) diagram constitute a linear trend, with a declination rate of -1.6. This phenomenon is common in minerals with highly developed cleavage and attributed to random reflection on rock surface and subsurface reflection in the mineral interior of calcite. The rock blocks extracted from the quarries commonly have a large number of cavities and the resin-fill technique is frequently applied. It is recommended that the resin colours be adjusted adequately according to the above-mentioned linear trend in order to make the patched limestone visually appear as the natural one. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-06-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672005000200004 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672005000200004 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0370-44672005000200004 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Escola de Minas |
publisher.none.fl_str_mv |
Escola de Minas |
dc.source.none.fl_str_mv |
Rem: Revista Escola de Minas v.58 n.2 2005 reponame:REM. Revista Escola de Minas (Online) instname:Escola de Minas instacron:ESCOLA DE MINAS |
instname_str |
Escola de Minas |
instacron_str |
ESCOLA DE MINAS |
institution |
ESCOLA DE MINAS |
reponame_str |
REM. Revista Escola de Minas (Online) |
collection |
REM. Revista Escola de Minas (Online) |
repository.name.fl_str_mv |
REM. Revista Escola de Minas (Online) - Escola de Minas |
repository.mail.fl_str_mv |
editor@rem.com.br |
_version_ |
1754122196366655488 |