COLORIMETRY CHARACTERIZATION OF THE WOOD OF MUIRAPIRANGA (Brosimum rubescens Taub.) AND OF RUBBER TREE (Hevea brasiliensis, clone Tjir 16 Müll Arg.) AIMING AT INSIDE USE
DOI:
https://doi.org/10.5902/198050981926Keywords:
wood, muirapiranga, rubber tree, color.Abstract
Although recent, the technique for the determination of wood color through the quantitative colorimetry seems to be efficient. The CIELAB 1976 system cuhich determines the L *, a *, b *, C and h * colorimetric parameters, seemed to be efficient for the determination of the color of the muirapiranga wood (Brosimum rubescens) and of rubbertree (Hevea brasiliensis, clone Tjir 16). The muirapiranga wood is of brownish red color (L * of 42,39), having the red pigment (a * out of 22,02) as determinant, although the yellow pigment (b *) has significant influences on the definition of its color. The rubbertree wood presents yellow color (L * of 77,55), strongly influenced by the yellow pigment (b * of 19,61). Considering the color as a parameter, both wood presents potentials for use.
Downloads
References
BURGER, M. B. ; RITCHER, H. G. Anatomia da madeira. São Paulo : Nobel, 1991.
CAMARGOS, J. A. A. ; GONÇALEZ, J. C. A colorimetria aplicada como instrumento na elaboração de uma tabela de cores de madeira. Brasil Florestal, Brasília, n. 71, 2001.
FOREST PRODUCTS LABORATORY. Wood handbook : wood as an engineering material. Madison : U. S. Departament of Agriculture. Forest Service. Forest Products Laboratory, 1999. 463p. (Gen. Tech. Rep. FPL-GTR-113)
GONÇALEZ, J. C. Caracterisation technologique de quatre especies peu connues da la fôret Amazonienne: anatomie, chimie,couler,proprietés physiques et mécaniques. Nancy, 1993. 446f. : il. Thèse (Doctorat) – Ecole Nationale du Génie Rural des Eaux et des Forêts, Nancy, 1993.
GONÇALEZ, J. C.; JANIN, G.; SANTORO, A. C. S.; COSTA, A. F.; VALLE, A. T. Colorimetria quantitativa: uma técnica objetiva de determinar a cor da madeira. Brasil Florestal, Brasília, n. 72, 2001.
GREENBERG, A. D.; GREENBERG, S. PhotoShop - Versão 3.0. São Paulo: Makron Books, 1995.
PANSHIN, A. J.; ZEEUW, C. Textbook of wood technology. 3. ed. New York : McGraw-Hill, 1970. v.1.
STAR COLOR. CIE Lab Color System. Disponível em <http://www.starcolor.co.th/1qc.html> Acesso em: 3 dez. 2004.
