Rice millers aim for maximizing HRY and whiteness for
maximum profitability. The present study was undertaken
with the objective to quantify reduction in HRY and variation
of whiteness during milling in relation the physicochemical
properties of the selected Thai rice varieties.
The reduction in HRY during milling was found be best
represented by a non-linear power model with R2 of fitting
ranging from 0.974 to 0.997 and the RMSE values of less
than 1.0% for the selected rice varieties. The regression
parameters of the model were found to be the function of
physicochemical properties of the milled rice. The HRY
during milling of selected rice varieties could be estimated
from their physicochemical properties within ±10% of
the actual values using the developed relationships