La qualité de l'aspect des placages de chênes : mesures de couleur et critères d'appréciation des professionnels français et italiens

Mazet, J.; Janin, G.

doi:10.1051/forest:19900306

Cited by 17 publications

(11 citation statements)

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“…The variation in the colour space of a three-dimensional model is the quadratic summation of differences in each coordinate (Gonnet, 1993). Mazet and Janin (1990) report that oak veneer samples evaluated by 90 French and Italian assessors from woodworking industries consider that a difference of over two units in the value of [(L * − L * ) 2 + (a * − a * ) 2 + (b * − b * ) 2 ] is distinguishable to the human eye. For agricultural or horticultural applications this difference varied from 1.0 to 3.0 (Voss and Hale, 1998).…”

Section: Wood Colourmentioning

confidence: 99%

“…Wood colour, which differs widely among species as well as within a single tree (Liu et al, 2005;Nishino et al, 1998), is an important factor for determining specific uses such as furniture and decorative veneers, both very important marketing attributes (Mazet and Janin, 1990). One of the most accurate and commonly used systems for measuring wood colour is the CIELab colour system.…”

Section: Introductionmentioning

confidence: 99%

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Wood colour variation in sapwood and heartwood of young trees of Tectona grandis and its relationship with plantation characteristics, site, and decay resistance

Moya

Berrocal

2010

Ann. For. Sci.

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To cite this version:Róger Moya, Alexander Berrocal. Wood colour variation in sapwood and heartwood of young trees of Tectona grandis and its relationship with plantation characteristics, site, and decay resistance. Annals of Forest Science, Springer Verlag/EDP Sciences, 2010, 67 (1), <10.1051/forest/2009088>. Ann. For. Sci. 67 (2010) • With the purpose of understanding the colour variation, different fast-growth plantations were sampled with different growth rates, tree ages, and sites.• Wood colour was measured with a CIELab system, where three variables are estimated: coordinate L * for lightness, coordinate a * defines redness and coordinate b * defines yellowness.• Results showed only a negative correlation between L * and a * . L * and a * were negatively and positively respectively correlated with pith distance in heartwood, but not for b * . No correlations were found between L * and b * in sapwood and plantation characteristics, while a * was positively correlated with age and height of tree and growth rate. In heartwood, tree age and diameter at breast height were correlated with all colour parameters, but tree height and plantation density were correlated with a * and b * . Cluster site had correlation with L * . Multiple correlation analysis showed that the heartwood is increasing darker (L * ) and redder (a * ) when the trees are older and bigger. Correlation coefficient shown that sapwood and heartwood with lighter colour (L * ) is less resistance to fungal attack, but redness colour (a * ) increasing decay resistance. Mots-clés :CIELab / bois tropicaux / Tectona grandis / aubier / bois de coeur / plantations Résumé -Les variations de couleur dans l'aubier et le duramen de jeunes arbres de Tectona grandis, en relation avec les caractéristiques des plantations, du site et de la durabilité.• Il y a une grande variabilité de la couleur du bois de Tectona grandis produit à partir de plantations à croissance rapide et les causes de ces variations sont relativement inconnues.• Pour comprendre l'origine des variations de couleur nous avons échantillonné dans des plantations à croissance rapide qui diffèrent entre elles en termes de vitesse de croissance, d'âge et de site.• La couleur du bois a été mesurée avec le système CIELab qui permet la mesure de trois variables colorimétriques : la luminance L * allant du noir au blanc, a * et b * allant respectivement du vert au rouge et du bleu au jaune.• Les résultats montrent une corrélation négative entre L * et a * . Dans le bois le coeur il y a une corrélation négative entre L * et la distance à la moelle et une corrélation positive entre a * et la distance à la moelle : aucune corrélation n'apparaît pour b * .

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Section: Wood Colourmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wood colour variation in sapwood and heartwood of young trees of Tectona grandis and its relationship with plantation characteristics, site, and decay resistance

Moya

Berrocal

2010

Ann. For. Sci.

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“…A survey of wood-using professionals by Mazet and Janin (1990) showed that lightness is the most important color criterion, followed by its hue and saturation. Flot (1988), Nieminen (1988) and Klumpers (1990).…”

mentioning

confidence: 99%

The influences of age, extractive content and soil water on wood color in oak: the possible genetic determination of wood color

Klumpers¹,

Janin²,

Becker³

et al. 1993

Ann. For. Sci.

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“…Trees from MP with higher HWP are considered an advantage because their wood is an important factor for determining specific uses such as furniture and decorative veneers, both very important marketing attributes (Mazet and Janin, 1990) associated with high decay resistance as well (Moya and Berrocal, 2010). According to that, MP of S. saman with S. glauca (T14) is less favourable because it produced trees with the lowest HWP values.…”

Section: Discussionmentioning

confidence: 99%

Silviculture conditions and wood properties of Samanea saman and Enterolobium cyclocarpum in 19-year-old mixed plantations

Obando

Moya

2013

For. syst.

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Aim of study: The objective of this work is to examine wood properties of a mixed plantation of Samanea saman and Enterolobium cyclocarpum, combined with native species of Costa Rica.Area of study: Mixed plantation in dry tropical zone of Costa Rica.Material and Methods: It was measured by total diameter, heartwood, bark thickness, several physical wood properties (green density, specific gravity, volumetric, tangential and radial shrinkage and moisture content) and wood color.Main results: The largest of this diameter are reached when S. saman is planted with E. cyclocarpum, E. cyclocarpum and Swietenia macrophylla and Simarouba glauca. Meanwhile the largest total diameter and heartwood in E. cyclocarpum was found when this species is planted with Dalbergia retusa. Heartwood percentage, bark percentage, and some physical properties are not affected when S. saman or E. cyclocarpum are planted with other species. However, parameters of wood color were affected mixture plantation of S. saman or E. cyclocarpum with other species. The lowest difference between wood from mixed plantations and wood from trees growing in native forests is produced when S. saman is mixed with E. cyclocarpum, but this last species is mixed with Hymenaea courbaril and produced wood with the lowest difference in wood color compared to trees growing in the natural forest.Research highlights: S. saman and E. cyclocarpum tress planted in a mixed plantation produce variation in breast diameter, physical properties, heartwood percentage and wood color.Keywords: silvicultural condition; wood properties; tropical species; plantation species.

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La qualité de l'aspect des placages de chênes : mesures de couleur et critères d'appréciation des professionnels français et italiens

Cited by 17 publications

References 0 publications

Wood colour variation in sapwood and heartwood of young trees of Tectona grandis and its relationship with plantation characteristics, site, and decay resistance

Wood colour variation in sapwood and heartwood of young trees of Tectona grandis and its relationship with plantation characteristics, site, and decay resistance

The influences of age, extractive content and soil water on wood color in oak: the possible genetic determination of wood color

Silviculture conditions and wood properties of Samanea saman and Enterolobium cyclocarpum in 19-year-old mixed plantations

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