Efecto de los acabados en la durabilidad de la madera de 10 especies provenientes de plantación forestal de rápido crecimiento

This study evaluated wood color change (ΔE*) and the surface quality in ten tropical wood
protected with three finishes (based in wax and polyurethane) and coatings development for
tropical conditions in natural (NW) and accelerated (AW) weathering condition. The results
showed that the application of these finishes, decreased lightness (L*), increased the
redness (a*) and yellowness (b*) parameters in all species. ΔE* values found in different
finishes and coatings are cataloged as total change of color. It was found that NW produced
the higher ΔE* and defects in the coating than AW. Other important results was that
tropical clear wood with natural coating produces the higher ∆E* than dark wood color. L*
and b* parameters were the most significantly effects on ΔE* of coatings, but any
treatments of surface of wood L*, a* and b* affects ΔE*. The stains and fungal
development was observed in polyurethane finishes in NW, but not AW. The irregular and
mosaic flaw were not observed. The quality index created, which includes long and short
line and switch flaw was lowest in NW and was lowest in waxy finish and the highest
polyurethane finish.