This indicated that large amount of ash from the bran layers of red rice caryopsis leached out, similar to what was previously reported for fat, during the hydration at 60 C. The ash content of MPB-10 red rice is concentrated in the outer layers of the bran, while a more homogeneous distribution of ash is observed in IAC-600 black rice cultivar. This fact may have contributed to the higher reduction of ash in red rice as a consequence of parboiling.