After polishing, the white rice is separated into head rice and,
large and small broken rice by a sifter. Head rice is normally
classified as kernels, which are 75-80% or more of a whole kernel. The
sifter is made up of a series of oscillating screens through which the
rice passes. The output from the bottom screen is the very fine broken
tips and is called the “brewers”. To attain a higher degree of precision
for grading and separation, a rice grader machine
