Effects of Wood Roughness, Light Pigments, and Water Repellent on the Color Stability of Painted Spruce Subjected to Natural and Accelerated Weathering
This study examined the color stability of painted Norway spruce (Picea abies) samples subjected to natural and accelerated weathering, using Duncan’s tests and correlation analyses. The following effects were studied: (1) the different initial roughness of the wood; (2) use of transparent or lightl...
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| Format: | Article |
| Language: | English |
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North Carolina State University
2015-09-01
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| Series: | BioResources |
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| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_4_7203_Reinprecht_Wood_Roughness_Painted_Spruce |
| _version_ | 1811269306948780032 |
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| author | Ladislav Reinprecht Miloš Pánek |
| author_facet | Ladislav Reinprecht Miloš Pánek |
| author_sort | Ladislav Reinprecht |
| collection | DOAJ |
| description | This study examined the color stability of painted Norway spruce (Picea abies) samples subjected to natural and accelerated weathering, using Duncan’s tests and correlation analyses. The following effects were studied: (1) the different initial roughness of the wood; (2) use of transparent or lightly-pigmented top-coat layers; and (3) the presence of the final water-repellent layer. Natural weathering at a 45° slope in an industrial zone lasted 104 weeks, whereas accelerated weathering in Xenotest with 0.55 W/m2 UV irradiation at 340 nm and sprayed water lasted 12 weeks. The color stability of painted spruce, measured in a CIE-L*a*b* system, was not, in the majority of cases, significantly affected by the initial roughness of the wood, the type of top-coat (WoodCare UV or PerlColor) layer, or presence of the final water repellent (AquaStop) layer. The light pine or larch pigments in the top-coat layers had positive color stabilizing effects. In their presence, the darkening (-L*) and total color differences (E*) of the painted samples dropped ca. 2.5 times during exterior weathering and ca. 5 times during Xenotest weathering. Samples painted with transparent coatings turned a reddish shade (+a*) during the Xenotest, while those exposed to the exterior absorbed dirt and became more blue (-b*). |
| first_indexed | 2024-04-12T21:39:35Z |
| format | Article |
| id | doaj.art-2ecd8458f60544589e7721e4ce968ed2 |
| institution | Directory Open Access Journal |
| issn | 1930-2126 1930-2126 |
| language | English |
| last_indexed | 2024-04-12T21:39:35Z |
| publishDate | 2015-09-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-2ecd8458f60544589e7721e4ce968ed22022-12-22T03:15:48ZengNorth Carolina State UniversityBioResources1930-21261930-21262015-09-011047203721910.15376/biores.10.4.7203-7219Effects of Wood Roughness, Light Pigments, and Water Repellent on the Color Stability of Painted Spruce Subjected to Natural and Accelerated WeatheringLadislav Reinprecht0Miloš Pánek1Technical University in Zvolen; SlovakiaCzech University of Life Sciences, Prague; Czech RepublicThis study examined the color stability of painted Norway spruce (Picea abies) samples subjected to natural and accelerated weathering, using Duncan’s tests and correlation analyses. The following effects were studied: (1) the different initial roughness of the wood; (2) use of transparent or lightly-pigmented top-coat layers; and (3) the presence of the final water-repellent layer. Natural weathering at a 45° slope in an industrial zone lasted 104 weeks, whereas accelerated weathering in Xenotest with 0.55 W/m2 UV irradiation at 340 nm and sprayed water lasted 12 weeks. The color stability of painted spruce, measured in a CIE-L*a*b* system, was not, in the majority of cases, significantly affected by the initial roughness of the wood, the type of top-coat (WoodCare UV or PerlColor) layer, or presence of the final water repellent (AquaStop) layer. The light pine or larch pigments in the top-coat layers had positive color stabilizing effects. In their presence, the darkening (-L*) and total color differences (E*) of the painted samples dropped ca. 2.5 times during exterior weathering and ca. 5 times during Xenotest weathering. Samples painted with transparent coatings turned a reddish shade (+a*) during the Xenotest, while those exposed to the exterior absorbed dirt and became more blue (-b*).http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_4_7203_Reinprecht_Wood_Roughness_Painted_SpruceWood roughnessWood repellentPigmentsColor changesPhotodegradation |
| spellingShingle | Ladislav Reinprecht Miloš Pánek Effects of Wood Roughness, Light Pigments, and Water Repellent on the Color Stability of Painted Spruce Subjected to Natural and Accelerated Weathering BioResources Wood roughness Wood repellent Pigments Color changes Photodegradation |
| title | Effects of Wood Roughness, Light Pigments, and Water Repellent on the Color Stability of Painted Spruce Subjected to Natural and Accelerated Weathering |
| title_full | Effects of Wood Roughness, Light Pigments, and Water Repellent on the Color Stability of Painted Spruce Subjected to Natural and Accelerated Weathering |
| title_fullStr | Effects of Wood Roughness, Light Pigments, and Water Repellent on the Color Stability of Painted Spruce Subjected to Natural and Accelerated Weathering |
| title_full_unstemmed | Effects of Wood Roughness, Light Pigments, and Water Repellent on the Color Stability of Painted Spruce Subjected to Natural and Accelerated Weathering |
| title_short | Effects of Wood Roughness, Light Pigments, and Water Repellent on the Color Stability of Painted Spruce Subjected to Natural and Accelerated Weathering |
| title_sort | effects of wood roughness light pigments and water repellent on the color stability of painted spruce subjected to natural and accelerated weathering |
| topic | Wood roughness Wood repellent Pigments Color changes Photodegradation |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_4_7203_Reinprecht_Wood_Roughness_Painted_Spruce |
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