Effect of extractives on wood color of heat treated Pinus radiata and Eucalyptus pellita
Heat treatment can change wood color without any use of environmentally harmful chemicals, and the efficiency of this process depends on the raw material to be treated. The objective of this study was to evaluate the influence of extractives on the color change of Eucalyptus pellita and Pinus radiat...
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Universidad del Bío-Bío
2015
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oai:scielo:S0718-221X20150004000142016-10-25Effect of extractives on wood color of heat treated Pinus radiata and Eucalyptus pellitaVinha,Antônio JoséCarvalho,Amélia GuimarãesTeixeira de Souza,MileneMarangon Jardim,Carolinade Cassia Oliveira Carneiro,AngélicaLuiz Colodette,Jorge Colorimetry green-red coordinate lightness thermal treatment wood extractives Heat treatment can change wood color without any use of environmentally harmful chemicals, and the efficiency of this process depends on the raw material to be treated. The objective of this study was to evaluate the influence of extractives on the color change of Eucalyptus pellita and Pinus radiata wood during heat treatment. The extractives were extracted in cold water and in dichloromethane as well as totally removed and the wood was treated at 170°C and 200°C for three hours under atmospheric pressure and in presence of air for evaluating the lightness (L*), green-red coordinate (a*), blue-yellow coordinate (b*), color saturation (C) and tonality angle (H) values. Pinus radiata wood was more resistant to discoloration by heat treatment. The removal of total and cold water-soluble extractives before heat treatment changed the L* value of Pinus radiata, a* value of Eucalyptus pellita, and b*, C, and H values of both species. Removal of extractives soluble in dichloromethane did not affect the color of heat treated wood. Thus, understanding the influence of extractives on heat treated wood can allow adapting the raw material to the process for enhancing the applicability of heat treatment for changing wood color.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.17 n.4 20152015-10-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2015000400014en10.4067/S0718-221X2015005000074 |
| institution |
Scielo Chile |
| collection |
Scielo Chile |
| language |
English |
| topic |
Colorimetry green-red coordinate lightness thermal treatment wood extractives |
| spellingShingle |
Colorimetry green-red coordinate lightness thermal treatment wood extractives Vinha,Antônio José Carvalho,Amélia Guimarães Teixeira de Souza,Milene Marangon Jardim,Carolina de Cassia Oliveira Carneiro,Angélica Luiz Colodette,Jorge Effect of extractives on wood color of heat treated Pinus radiata and Eucalyptus pellita |
| description |
Heat treatment can change wood color without any use of environmentally harmful chemicals, and the efficiency of this process depends on the raw material to be treated. The objective of this study was to evaluate the influence of extractives on the color change of Eucalyptus pellita and Pinus radiata wood during heat treatment. The extractives were extracted in cold water and in dichloromethane as well as totally removed and the wood was treated at 170°C and 200°C for three hours under atmospheric pressure and in presence of air for evaluating the lightness (L*), green-red coordinate (a*), blue-yellow coordinate (b*), color saturation (C) and tonality angle (H) values. Pinus radiata wood was more resistant to discoloration by heat treatment. The removal of total and cold water-soluble extractives before heat treatment changed the L* value of Pinus radiata, a* value of Eucalyptus pellita, and b*, C, and H values of both species. Removal of extractives soluble in dichloromethane did not affect the color of heat treated wood. Thus, understanding the influence of extractives on heat treated wood can allow adapting the raw material to the process for enhancing the applicability of heat treatment for changing wood color. |
| author |
Vinha,Antônio José Carvalho,Amélia Guimarães Teixeira de Souza,Milene Marangon Jardim,Carolina de Cassia Oliveira Carneiro,Angélica Luiz Colodette,Jorge |
| author_facet |
Vinha,Antônio José Carvalho,Amélia Guimarães Teixeira de Souza,Milene Marangon Jardim,Carolina de Cassia Oliveira Carneiro,Angélica Luiz Colodette,Jorge |
| author_sort |
Vinha,Antônio José |
| title |
Effect of extractives on wood color of heat treated Pinus radiata and Eucalyptus pellita |
| title_short |
Effect of extractives on wood color of heat treated Pinus radiata and Eucalyptus pellita |
| title_full |
Effect of extractives on wood color of heat treated Pinus radiata and Eucalyptus pellita |
| title_fullStr |
Effect of extractives on wood color of heat treated Pinus radiata and Eucalyptus pellita |
| title_full_unstemmed |
Effect of extractives on wood color of heat treated Pinus radiata and Eucalyptus pellita |
| title_sort |
effect of extractives on wood color of heat treated pinus radiata and eucalyptus pellita |
| publisher |
Universidad del Bío-Bío |
| publishDate |
2015 |
| url |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2015000400014 |
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