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Colour changes of heat‐treated woods of red‐bud maple, European hophornbeam and oak
Author(s) -
Turgut Sahin Halil,
Burak Arslan M.,
Korkut Suleyman,
Sahin Candan
Publication year - 2011
Publication title -
color research and application
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.393
H-Index - 62
eISSN - 1520-6378
pISSN - 0361-2317
DOI - 10.1002/col.20634
Subject(s) - lightness , maple , horticulture , significant difference , botany , colour difference , chemistry , sugar , food science , biology , mathematics , optics , physics , statistics
Colour evolution and colour changes were analyzed from small specimens of three heat treated wood species using the CIE L * a * b * colour space. Upon heat exposure, the wood substance became darker of species; this was accompanied by a steady reduction in lightness. As treatment conditions (e.g., time and temperature) increase, various shades of yellow were favoured for the surface of red‐bud maple wood (Δ b = 1.22–9.79). For European hophornbeam wood, increased times at elevated temperatures make a blue (− b ) colour the better choice. The total colour difference (Δ E ) of the surfaces of wood substrates appear to be well correlated with the treatment temperature and time. The FTIR spectra suggest that the level of modification was insufficient for removing the major cell wall constituents of the wood substrates. All heat‐treated samples showed much less stability against colour difference in outdoor conditions. For red‐bud maple, the greatest improvement was achieved for samples that were treated at 150°C for 2 h (Δ E = 3.12). However, heat‐treated oak wood hadmuch less stability of colour difference for treatment conditions of 150°C for 10 h. © 2010 Wiley Periodicals, Inc. Col Res Appl, 2010.