Heat-treatment influence on <em>Cunninghamia lanceolata</em> discoloration

TANG Rong-qiang; BAO Bin-fu; LI Yan-jun

doi:10.11833/j.issn.2095-0756.2011.03.017

Volume 28 Issue 3

Jun. 2011

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TANG Rong-qiang, BAO Bin-fu, LI Yan-jun. Heat-treatment influence on Cunninghamia lanceolata discoloration[J]. Journal of Zhejiang A&F University, 2011, 28(3): 455-459. doi: 10.11833/j.issn.2095-0756.2011.03.017

Citation:

TANG Rong-qiang, BAO Bin-fu, LI Yan-jun. Heat-treatment influence on Cunninghamia lanceolata discoloration[J]. Journal of Zhejiang A&F University, 2011, 28(3): 455-459. doi: 10.11833/j.issn.2095-0756.2011.03.017

Heat-treatment influence on Cunninghamia lanceolata discoloration

doi: 10.11833/j.issn.2095-0756.2011.03.017

1.
College of Engineering，Zhejiang A & F University，Lin’an 311300，China

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Corresponding author: BAO Bin-fu
Publish Date: 2011-06-20

Abstract

This paper investigates the effect of heat-treatment temperature and processing time on Chinese fir（Cunninghamia lanceolata） discoloration. Chinese fir boards were heat treated at 170 C，190 C and 210 C for 2 h，3 h and 4 h respectively，and then the color values of Chinese fir before and after heat treatment were determined by a Chroma Meter DC-P3. And the effect on color characteristics of sapwood and heartwood were compared. Results showed that with increases of time and temperature，the brightness of the specimens board brightness （） decreasesd and the chroma （E） increased. Similar rules of change for brightness and chromatism of sapwood and heartwood were found with a strong relationship between and E（number of coefficients r = - 0.999 5 for both sapwood and heartwood）. Color indexes b* of sapwood increased first at 170 ℃，190 ℃ and then decreased at 210 ℃. Overall，temperature had a greater effect on color of Chinese fir boards than time with heat treatment affecting sapwood more than heartwood.［Ch，4 tab. 18 ref.］
- wood science,
- Chinese fir （Cunninghamia lanceolata）,
- heat-treatment,
- color

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Heat-treatment influence on Cunninghamia lanceolata discoloration

1. College of Engineering，Zhejiang A & F University，Lin’an 311300，China

Corresponding author: BAO Bin-fu

Publish Date: 2011-06-20

Key words:

Abstract: This paper investigates the effect of heat-treatment temperature and processing time on Chinese fir（Cunninghamia lanceolata） discoloration. Chinese fir boards were heat treated at 170 C，190 C and 210 C for 2 h，3 h and 4 h respectively，and then the color values of Chinese fir before and after heat treatment were determined by a Chroma Meter DC-P3. And the effect on color characteristics of sapwood and heartwood were compared. Results showed that with increases of time and temperature，the brightness of the specimens board brightness （） decreasesd and the chroma （E） increased. Similar rules of change for brightness and chromatism of sapwood and heartwood were found with a strong relationship between and E（number of coefficients r = - 0.999 5 for both sapwood and heartwood）. Color indexes b* of sapwood increased first at 170 ℃，190 ℃ and then decreased at 210 ℃. Overall，temperature had a greater effect on color of Chinese fir boards than time with heat treatment affecting sapwood more than heartwood.［Ch，4 tab. 18 ref.］

Heat-treatment influence on Cunninghamia lanceolata discoloration

doi: 10.11833/j.issn.2095-0756.2011.03.017

Abstract

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通讯作者: 陈斌, bchen63@163.com

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Heat-treatment influence on Cunninghamia lanceolata discoloration

doi: 10.11833/j.issn.2095-0756.2011.03.017

1. College of Engineering，Zhejiang A & F University，Lin’an 311300，China

Corresponding author: BAO Bin-fu

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Heat-treatment influence on Cunninghamia lanceolata discoloration

doi: 10.11833/j.issn.2095-0756.2011.03.017

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Heat-treatment influence on Cunninghamia lanceolata discoloration

doi: 10.11833/j.issn.2095-0756.2011.03.017

1. College of Engineering，Zhejiang A & F University，Lin’an 311300，China

Corresponding author: BAO Bin-fu

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