Studies on the loss of gloss of shellac and polyurethane finishes exposed to UV

Wood finishes protect the surface of wood from external agents, enhance its looks and improve its gloss (luster). On constant external exposure, UV rays gradually degrade the film coating resulting in loss of gloss. In this study, two commonly used finishes namely spirit shellac and polyurethane fin...

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Autores principales:	Ghosh,Mili, Gupta,Sachin, Kumar,V.S. Kishan
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2015
Materias:	Gloss shellac polyurethane ultra violet Eucalyptus
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2015000100005
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spelling	oai:scielo:S0718-221X20150001000052015-06-17Studies on the loss of gloss of shellac and polyurethane finishes exposed to UVGhosh,MiliGupta,SachinKumar,V.S. Kishan Gloss shellac polyurethane ultra violet Eucalyptus Wood finishes protect the surface of wood from external agents, enhance its looks and improve its gloss (luster). On constant external exposure, UV rays gradually degrade the film coating resulting in loss of gloss. In this study, two commonly used finishes namely spirit shellac and polyurethane finish were used to investigate the pattern of loss of gloss due to UV interference. Two coatings of polyurethane (PU) and spirit shellac finish were applied on the surface of eucalyptus samples. The gloss levels of these and unfinished samples were monitored for different times of exposure of them to UV light. Gloss was measured at 600 gloss head using a Tri micro gloss meter regularly for 20 hours durations of UV exposure. Observations and analysis revealed that the natural gloss of uncoated samples of eucalyptus were least affected on UV exposure with only 8,3%-10% loss in gloss. The PU and shellac coated surfaces also showed very little reduction in gloss (6,9%-15,4%) most of which happened in the first 40 hours of exposure. Thus both the finishes in this study were found effective to a good extent in maintaining the gloss of the finished surface against exposure to UV light.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.17 n.1 20152015-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2015000100005en10.4067/S0718-221X2015005000004
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Gloss shellac polyurethane ultra violet Eucalyptus
spellingShingle	Gloss shellac polyurethane ultra violet Eucalyptus Ghosh,Mili Gupta,Sachin Kumar,V.S. Kishan Studies on the loss of gloss of shellac and polyurethane finishes exposed to UV
description	Wood finishes protect the surface of wood from external agents, enhance its looks and improve its gloss (luster). On constant external exposure, UV rays gradually degrade the film coating resulting in loss of gloss. In this study, two commonly used finishes namely spirit shellac and polyurethane finish were used to investigate the pattern of loss of gloss due to UV interference. Two coatings of polyurethane (PU) and spirit shellac finish were applied on the surface of eucalyptus samples. The gloss levels of these and unfinished samples were monitored for different times of exposure of them to UV light. Gloss was measured at 600 gloss head using a Tri micro gloss meter regularly for 20 hours durations of UV exposure. Observations and analysis revealed that the natural gloss of uncoated samples of eucalyptus were least affected on UV exposure with only 8,3%-10% loss in gloss. The PU and shellac coated surfaces also showed very little reduction in gloss (6,9%-15,4%) most of which happened in the first 40 hours of exposure. Thus both the finishes in this study were found effective to a good extent in maintaining the gloss of the finished surface against exposure to UV light.
author	Ghosh,Mili Gupta,Sachin Kumar,V.S. Kishan
author_facet	Ghosh,Mili Gupta,Sachin Kumar,V.S. Kishan
author_sort	Ghosh,Mili
title	Studies on the loss of gloss of shellac and polyurethane finishes exposed to UV
title_short	Studies on the loss of gloss of shellac and polyurethane finishes exposed to UV
title_full	Studies on the loss of gloss of shellac and polyurethane finishes exposed to UV
title_fullStr	Studies on the loss of gloss of shellac and polyurethane finishes exposed to UV
title_full_unstemmed	Studies on the loss of gloss of shellac and polyurethane finishes exposed to UV
title_sort	studies on the loss of gloss of shellac and polyurethane finishes exposed to uv
publisher	Universidad del Bío-Bío
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2015000100005
work_keys_str_mv	AT ghoshmili studiesonthelossofglossofshellacandpolyurethanefinishesexposedtouv AT guptasachin studiesonthelossofglossofshellacandpolyurethanefinishesexposedtouv AT kumarvskishan studiesonthelossofglossofshellacandpolyurethanefinishesexposedtouv
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Studies on the loss of gloss of shellac and polyurethane finishes exposed to UV

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