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FLORAM receives Impact Factor

We are pleased to announce that FLORAM has received its first impact factor rating in the 2022 Journal Citation Reports (JCR).

Now FLORAM has the highest impact factor among Brazilian Forest Sciences journals.

Floresta e Ambiente
https://floram.org/article/doi/10.1590/2179-8087.013612
Floresta e Ambiente
Original Article Forest Products

Alteração da Cor da Madeira de Teca por Tratamento Térmico

Alteração da Cor da Madeira de Teca por Tratamento Térmico

Lopes, Juliana de Oliveira; Garcia, Rosilei Apda.; Latorraca, João Vicente de F.; Nascimento, Alexandre Miguel do

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Resumo

O objetivo deste estudo foi determinar o efeito do tratamento térmico na alteração da cor da madeira de teca (Tectona grandis L. f.), proveniente de plantios de diferentes espaçamentos. Amostras de madeira de cerne e de alburno foram tratadas a 180 e 200°C durante 2h30min. As análises colorimétricas foram realizadas com o auxílio do espectrofotômetro CM 2600d no sistema CIE L*a*b*. Após o tratamento, a madeira teve perda de luminosidade, tornado-se mais escura, o que se mostrou mais acentuado para o tratamento a 200°C. As madeiras de cerne e alburno apresentaram comportamentos diferentes para as coordenadas a* e b*, dependendo do espaçamento, antes e após o tratamento. Ocorreu uma maior formação de pigmento vermelho e perda de pigmento amarelo nas madeiras de cerne e alburno tratadas a 200°C.

Palavras-chave

colorimetria, sistema CIE L*a*b*, Tectona grandiscolorimetria, sistema CIE L*a*b*, Tectona grandis

Abstract

The purpose of this study was to determine the effect of heat treatment on color change of teak wood (Tectona grandis L. f.) from plantations of different spacings. Heartwood and sapwood samples were heat treated at 180 and 200°C for 2.5 hours. Colorimetric analyses were performed using a CM 2600d spectrophotometer in the CIE L*a*b* system. After heat treatment, the wood presented loss of light, becoming darker, which was more pronounced for the treatment at 200°C. Heartwood and sapwood showed different behaviors for the a* and b* coordinates, depending on the spacing, before and after heat treatments. There was an increase on red hue and a decrease on yellow hue of heartwood and sapwood treated at 200°C.

Keywords

colorimetry, CIE L*a*b* system, Tectona grandis
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