The results of our research showed that with increasing IR power and time of roasting, the BI of samples increased.
The effect of temperature on BI value was not significant.
The correlation coefficients showing the relationship between BI
(abs at 420 nm) and BI (color parameter is also presented in Fig. 6. It
shows a good correlation coefficient (r2 = 0.82) between BI (abs at
420 nm) and BI (color parameter).