TY - JOUR
T1 - Reduction of the surface colour variability of thermally modified Eucalyptus globulus wood by colour pre-grading and homogeneity thermal treatment
AU - Griebeler, C.
AU - Tondi, G.
AU - Schnabel, T.
AU - Iglesias, C.
AU - Ruiz, S.
N1 - Cited By :8
Export Date: 14 December 2023
Correspondence Address: Griebeler, C.; Agroforestry Engineering Department, Spain; email: [email protected]
Funding details: European Cooperation in Science and Technology, COST, FP1303
Funding details: Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq
Funding text 1: Acknowledgements The authors wish to thank the COST Action FP1303 “Performance of bio-based building materials” for financing this research and the Salzburg University of Applied Sciences, Kuchl campus, for their help and facilities. This research was partially funded by the Brazilian National Council for Scientific and Technological Development (CNPq) through the doctoral grant of Carolina Griebeler by means of the “Ciência sem Fronteiras” program.
Funding text 2: The authors wish to thank the COST Action FP1303 “Performance of bio-based building materials” for financing this research and the Salzburg University of Applied Sciences, Kuchl campus, for their help and facilities. This research was partially funded by the Brazilian National Council for Scientific and Technological Development (CNPq) through the doctoral grant of Carolina Griebeler by means of the “Ciência sem Fronteiras” program. Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
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Part 1: Colour evolution and colour changes (2009) Holzforschung, 63 (4), pp. 385-393; Hauptmann, M., Pleschberger, H., Mai, C., Follrich, J., Hansmann, C., The potential of color measurements with the CIEDE2000 equation in wood science (2012) Eur J Wood Prod, 70 (4), pp. 415-420; (2008) Colorimetry—part 4: CIE 1976 L*a*b* colour space, , CIE Central Bureau, Vienna; Janin, G., González, J., Ananías, R., Charrier, B., Fernandes, G., Dilem, A., Aesthetics appreciation of wood colour and patterns by colorimetry. Part 1. Colorimetry theory for the CIELab systems (2001) Maderas Ciencia y Tecnología, 3 (1-2), pp. 3-13; Lima, J.T., Breese, M.C., Cahalan, C.M., Variation in wood density and mechanical properties in Eucalyptus clones (2000) Proceedings of the Future of Eucalypts for Wood Products, pp. 282-290. , Launceston, March; Montes, C.S., Hernández, R.E., Beaulieu, J., Weber, J.C., Genetic variation in wood color and its correlations with tree growth and wood density of Calycophyllum spruceanum at an early age in the Peruvian Amazon (2008) New For, 35 (1), pp. 57-73; Neumann, R.J., Kiln drying young Eucalyptus globulus boards from green (1989) IUFRO International Wood Drying Symposium, pp. 107-115. , Seattle, July; Nolan, G., Washusen, R., Jennings, S., Greaves, B., Parsons, M., (2005) Eucalypt plantations for solid wood products in Australia—a review, , Forest and Wood Products Australia Ltd., Project No.: PN04.3002; Northway, R.L., Blakemore, P.A., (1996) Evaluation of drying methods for plantation grown eucalypt timber: (c) sawing, accelerated drying and utilisation characteristics of Eucalyptus globulus, , Client report no. 117, CSIRO Forestry and Forest Products. 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Maiden, of different ages, for the furniture industry), , (In Portuguese) Tese, Doutorado em Engenharia Florestal, (Doctoral thesis) Universidade Federal do Paraná; Touza, M.C., Proyecto de investigación sobre sistemas de aserrado adecuados para procesar Eucalyptus globulus con tensiones de crecimiento (Research project on suitable sawing systems to process Eucalyptus globulus wood with growth tensions) (In Spanish) (2001) CIS Madera, 6, pp. 6-31; (1977) Características físico-mecánicas De La Madera, , Determinación del peso específico (Physico-mechanical characteristics of wood. Determination of the specific weight) (In Spanish). Asociación Española de Normalización y Certificación (AENOR). Madrid; Villegas, M.S., Rivera, S.M., Revisión xilológica de las principales especies del género Eucalyptus L’Herit. cultivadas en Argentina (Xylological review of the main species of the genus Eucalyptus L’Herit. cultivated in Argentina) (In Spanish) Revista de la Facultad de Agronomía (2002) La Plata, 105 (1), pp. 9-28
PY - 2018
Y1 - 2018
N2 - A new method that consists of combining wood pre-grading by surface colour followed by the application of homogeneity thermal treatments is proposed to reduce the surface colour variability of the thermally modified blue gum wood. To identify the conditions of the homogeneity thermal treatment for two pre-graded groups with different initial surface colours (pinkish and yellowish), the effects of applying 25 different thermal treatment intensities to such groups were analysed. The effects of this method on mass loss and volumetric swelling were also analysed. Results show that an optical pre-grading of the wood samples and treatments under different conditions can reduce the colour variability of the blue gum wood samples, as well as the volumetric swelling. Mass loss was not homogenised after the treatment, but the difference of masses between the two groups was similar to their untreated state. The application of this new methodology may be of interest for the sawn timber industry to bring more uniform boards on the markets and to promote Eucalyptus globulus as a price-competitive and sustainable alternative timber. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
AB - A new method that consists of combining wood pre-grading by surface colour followed by the application of homogeneity thermal treatments is proposed to reduce the surface colour variability of the thermally modified blue gum wood. To identify the conditions of the homogeneity thermal treatment for two pre-graded groups with different initial surface colours (pinkish and yellowish), the effects of applying 25 different thermal treatment intensities to such groups were analysed. The effects of this method on mass loss and volumetric swelling were also analysed. Results show that an optical pre-grading of the wood samples and treatments under different conditions can reduce the colour variability of the blue gum wood samples, as well as the volumetric swelling. Mass loss was not homogenised after the treatment, but the difference of masses between the two groups was similar to their untreated state. The application of this new methodology may be of interest for the sawn timber industry to bring more uniform boards on the markets and to promote Eucalyptus globulus as a price-competitive and sustainable alternative timber. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
KW - Colorimetry
KW - Grading
KW - Heat treatment
KW - Timber
KW - Wood products
KW - Blue Gum
KW - Eucalyptus globulus
KW - Mass loss
KW - Sawn timbers
KW - Surface colours
KW - Volumetric swelling
KW - Wood samples
KW - Color
KW - Eucalyptus Globulus
KW - Gums
KW - Heat Treatment
KW - Homogeneity
KW - Surfaces
KW - Variability
KW - Wood Products
U2 - 10.1007/s00107-018-1310-3
DO - 10.1007/s00107-018-1310-3
M3 - Article
SN - 0018-3768
VL - 76
SP - 1495
EP - 1504
JO - Eur. J. Wood Wood Prod.
JF - Eur. J. Wood Wood Prod.
IS - 5
ER -