Surface colour change in wood during drying above and below fibre saturation point
Fuente:
Redalyc
Guardado en:
| Autor principal: | |
|---|---|
| Formato: | Artículo científico |
| Lenguaje: | en |
| Publicado: |
Universidad del Bío Bío
2006
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1876429563668463616 |
|---|---|
| author | M. C. McCurdy |
| author_facet | M. C. McCurdy |
| contents | Surface colour change in wood during drying above and below fibre saturation point M. C. McCurdy R. B. Keey S. Pang Agrociencias wood colour wood drying kiln brown stain colour measurement A technique, useful for studying the formation of kiln brown stain in wood drying, has been developedto measure the surface colour change in a single board wood sample during drying. The wood sampleis planed carefully in the green state to remove any surface wood that was damaged during cutting. Theintact tracheids at the surface cause the evaporative front to remain at the surface during drying andtherefore colour formation also occurs right at the surface. In this way, the colour can be measured usinga spectrophotometer at various stages during drying without having to slice the sample.Experiments were carried out to measure the change in colour of wood from green to EMCcorresponding to the drying schedule used. At the end of each schedule the boards were held at theEMC to determine how the colour changed below fibre saturation point. The results show that thecolour of the wood continues to change below the fibre saturation point and the nature of the colourchange indicates an increase in the complexity of the coloured compounds present.Further experiments were done to measure the rate of colour development at different temperaturesusing the technique developed. The results have shown a correlation between temperature and colourdevelopment over the range 50ºC to 70ºC with the rate increasing significantly above 60ºC. 2006 artículo científico 0717-3644 https://www.redalyc.org/articulo.oa?id=48580106 en http://www.redalyc.org/revista.oa?id=485 Maderas. Ciencia y Tecnología application/pdf Universidad del Bío Bío Maderas. Ciencia y Tecnología (Chile) Num.1 Vol.8 |
| format | Artículo científico |
| id | redalyc_48580106 |
| institution | Redalyc |
| language | en |
| publishDate | 2006 |
| publisher | Universidad del Bío Bío |
| spellingShingle | Surface colour change in wood during drying above and below fibre saturation point M. C. McCurdy Agrociencias wood colour wood drying kiln brown stain colour measurement Surface colour change in wood during drying above and below fibre saturation point M. C. McCurdy R. B. Keey S. Pang Agrociencias wood colour wood drying kiln brown stain colour measurement A technique, useful for studying the formation of kiln brown stain in wood drying, has been developedto measure the surface colour change in a single board wood sample during drying. The wood sampleis planed carefully in the green state to remove any surface wood that was damaged during cutting. Theintact tracheids at the surface cause the evaporative front to remain at the surface during drying andtherefore colour formation also occurs right at the surface. In this way, the colour can be measured usinga spectrophotometer at various stages during drying without having to slice the sample.Experiments were carried out to measure the change in colour of wood from green to EMCcorresponding to the drying schedule used. At the end of each schedule the boards were held at theEMC to determine how the colour changed below fibre saturation point. The results show that thecolour of the wood continues to change below the fibre saturation point and the nature of the colourchange indicates an increase in the complexity of the coloured compounds present.Further experiments were done to measure the rate of colour development at different temperaturesusing the technique developed. The results have shown a correlation between temperature and colourdevelopment over the range 50ºC to 70ºC with the rate increasing significantly above 60ºC. 2006 artículo científico 0717-3644 https://www.redalyc.org/articulo.oa?id=48580106 en http://www.redalyc.org/revista.oa?id=485 Maderas. Ciencia y Tecnología application/pdf Universidad del Bío Bío Maderas. Ciencia y Tecnología (Chile) Num.1 Vol.8 |
| title | Surface colour change in wood during drying above and below fibre saturation point |
| topic | Agrociencias wood colour wood drying kiln brown stain colour measurement |
| url | https://www.redalyc.org/articulo.oa?id=48580106 |