Efectos de la intemperie en el color de dos acabados aplicados en madera de "cedrela odorata" y "Carapa guianensis"

• Autores: Juan Carlos Valverde Otárola, Róger Moya Roque
• Localización: Maderas: Ciencia y tecnología, ISSN 0717-3644, ISSN-e 0718-221X, Vol. 12, Nº. 3, 2010, págs. 171-180
• Idioma: español
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• Resumen

  • Carapa guianensis and Cedrela odorata wood are used for furniture and doors manufacturingin Costa Rica. Similarly, two kind wood coatings (nitrocellulose and polyurethane) are widely used inthese manufactures. However, the effects of degradation in the components of color (CIE L* a* b*)of these coatings by the weathering is little known for these wood species and these coatings. It wasevaluated these coatings under weathering and it was found that surface painted with polyurethaneand nitrocellulose produced significant change in wood color during the first 40-60 days of weatheringand the intensity of color change was different in two coatings. The results showed that color changesin Carapa guianensis wood were lower measured by ?E* than Cedrela odorata wood in two coatingof surface treatments. Finally, it was found that there are relationships among wood color parameters(L*, a*, c*) with weathering time and the relationship between color parameters (L*- a*, L*- b* anda*- b*) are altered by the coatings.