Color stability of weathered heat-treated teak wood
This study investigated the color stability in a heat treatment of teak wood (Tectona grandis) exposed to ultraviolet radiation under accelerated aging conditions. Nine trees from three different spacing levels were used. Samples of 150 mm x 75 mm x 20 mm were prepared and divided into two groups: heartwood and sapwood. Two levels of heat treatment (180 and 200°C) were used. The color was measured every 42 hours with a portable spectrophotometer using the CIE-Lab system. Accelerated aging was performed in a QUV/Spray chamber. The total cycle of exposure to ultraviolet radiation was of 168 hours at 340 nm. Tree planting spacing had no effect on color change after ultraviolet radiation. Untreated sapwood had greater color change than untreated heartwood. However, after heat treatment, sapwood showed high color stability, especially at a temperature of 180°C.
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Universidad del Bío-Bío
2014
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oai:scielo:S0718-221X20140004000082014-10-10Color stability of weathered heat-treated teak woodGarcia,Rosilei Aparecidade Oliveira Lopes,Julianado Nascimento,Alexandre Miguelde Figueiredo Latorraca,João Vicente CIE-Lab system heat treatment ultraviolet radiation This study investigated the color stability in a heat treatment of teak wood (Tectona grandis) exposed to ultraviolet radiation under accelerated aging conditions. Nine trees from three different spacing levels were used. Samples of 150 mm x 75 mm x 20 mm were prepared and divided into two groups: heartwood and sapwood. Two levels of heat treatment (180 and 200°C) were used. The color was measured every 42 hours with a portable spectrophotometer using the CIE-Lab system. Accelerated aging was performed in a QUV/Spray chamber. The total cycle of exposure to ultraviolet radiation was of 168 hours at 340 nm. Tree planting spacing had no effect on color change after ultraviolet radiation. Untreated sapwood had greater color change than untreated heartwood. However, after heat treatment, sapwood showed high color stability, especially at a temperature of 180°C.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.16 n.4 20142014-10-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2014000400008en |
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Garcia,Rosilei Aparecida de Oliveira Lopes,Juliana do Nascimento,Alexandre Miguel de Figueiredo Latorraca,João Vicente |
| spellingShingle |
Garcia,Rosilei Aparecida de Oliveira Lopes,Juliana do Nascimento,Alexandre Miguel de Figueiredo Latorraca,João Vicente Color stability of weathered heat-treated teak wood |
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Garcia,Rosilei Aparecida de Oliveira Lopes,Juliana do Nascimento,Alexandre Miguel de Figueiredo Latorraca,João Vicente |
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Garcia,Rosilei Aparecida |
| title |
Color stability of weathered heat-treated teak wood |
| title_short |
Color stability of weathered heat-treated teak wood |
| title_full |
Color stability of weathered heat-treated teak wood |
| title_fullStr |
Color stability of weathered heat-treated teak wood |
| title_full_unstemmed |
Color stability of weathered heat-treated teak wood |
| title_sort |
color stability of weathered heat-treated teak wood |
| description |
This study investigated the color stability in a heat treatment of teak wood (Tectona grandis) exposed to ultraviolet radiation under accelerated aging conditions. Nine trees from three different spacing levels were used. Samples of 150 mm x 75 mm x 20 mm were prepared and divided into two groups: heartwood and sapwood. Two levels of heat treatment (180 and 200°C) were used. The color was measured every 42 hours with a portable spectrophotometer using the CIE-Lab system. Accelerated aging was performed in a QUV/Spray chamber. The total cycle of exposure to ultraviolet radiation was of 168 hours at 340 nm. Tree planting spacing had no effect on color change after ultraviolet radiation. Untreated sapwood had greater color change than untreated heartwood. However, after heat treatment, sapwood showed high color stability, especially at a temperature of 180°C. |
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Universidad del Bío-Bío |
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2014 |
| url |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2014000400008 |
| work_keys_str_mv |
AT garciarosileiaparecida colorstabilityofweatheredheattreatedteakwood AT deoliveiralopesjuliana colorstabilityofweatheredheattreatedteakwood AT donascimentoalexandremiguel colorstabilityofweatheredheattreatedteakwood AT defigueiredolatorracajoaovicente colorstabilityofweatheredheattreatedteakwood |
| _version_ |
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