Table 1.
Change in L, a, b values1) of grape seed tea extracted from grape seeds which were roasted at different conditions.

Roasting Temp. (°C)	Color2)	Roasting time (min)
		10	20	30	40	50	60
		150	L	86.9±0.82a3)	84.9±0.88b	83.69±0.96bc	83.47±1.23bc	83.68±1.32bc	81.64±1.44c
a	1.23±0.15a		1.84±0.18b	2.31±0.09c	2.42±0.08c	2.58±0.16c	2.98±0.22d
b	15.46±0.23a		18.0±0.26b	19.19±0.29c	19.88±0.34cd	19.38±0.35c	20.55±0.42d
160	L	80.84±0.76a	78.48±0.7b8	77.86±0.88bc	77.18±0.92bc	76.71±1.12bc	76.25±1.26c
	a	3.26±0.24a	4.44±0.38b	4.90±0.40bc	4.93±0.42bc	5.73±0.45c	6.22±0.49c
	b	21.43±0.35a	23.62±0.44b	24.23±0.48b	24.36±0.48b	25.6±0.54c	26.23±0.66c
170	L	79.85±0.68a	79.59±0.66ab	78.30±0.78b	77.81±0.72b	77.06±0.8b	76.88±0.89b
	a	4.16±0.26a	4.95±0.38b	5.24±0.42b	5.57±0.44b	6.28±0.20c	6.43±0.38c
	b	24.17±0.42a	25.49±0.50b	25.63±0.51b	25.83±0.54b	26.94±0.48c	26.59±0.18c
180	L	78.99±0.64a	77.15±0.60b	76.61±0.51b	76.96±0.58b	77.97±0.58b	78.54±0.42a
	a	4.33±0.08a	5.40±0.10b	5.86±0.16c	6.15±0.18d	5.54±0.16b	5.72±0.18d
	b	23.62±0.08a	25.51±0.04b	25.71±0.05c	25.99±0.05d	25.35±0.06e	25.24±0.08e
190	L	76.47±0.46a	77.53±0.56b	79.13±0.62c	80.32±0.78c	80.51±0.76c	82.41±0.77d
	a	5.71±0.08a	5.54±0.08b	5.36±0.14c	4.89±0.16d	4.82±0.09d	3.87±0.14e
	b	26.59±0.10a	26.34±0.12b	26.37±0.06b	25.55±0.04c	25.43±0.06d	24.11±0.08e

L, a, b values of grape seed tea extracted from unroasted grape seed were 38.25±0.04, 13.50±0.15 and 23.21±0.05, respectively.
Color L; black (0)↔white (100) a; red (100~0)↔green (0~– 80) b; yellow (70~0)↔blue (0~–70).
Means in the same row bearing different superscripts are significantly different (p < 0.05).