However, at a fixed hot-pressing temperature, the effect of the
percentage of the rice bran on the air-dry density and the compressive
strength is not obvious. For instance, at a fixed temperature of 130 °C,
as the percentage of the rice bran increases from 20% (test B17) to 40%
(test B22), the air-dry densities in tests B17 (1.01 g/cm3) and B22
(1.02 g/cm3) are almost the same, but the compressive strength
slightly increases from 70.5 to 77.2 kgf/cm2.