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Official Journal of the Japan Wood Research Society

Table 1 Effect of different heating temperatures on heartwood color

From: Effects of heat treatment on water-soluble extractives and color changes of merbau heartwood

Heat treatment conditions

ΔL *

Δa *

Δb *

ΔE *

Heating temperature (°C)

Heating time elapsed (h)

Control

0.0

0.0

0.0

0.0

0.0

100

4

−13.5

1.2

−5.6

17.5

140

4

−16.8

2.3

−9.9

22.1

170

4

−32.5

−21.7

−12.6

41.1

200

4

−34.7

−40.8

−18.7

55.1