Particle size reduction is the process in which large, solid particles are broken down into smaller particle sizes. This process is often achieved by the use of high shear forces. Particle size reduction is a key process used to transform bulky or randomly sized substances into uniform, small particles suitable for a wide range of applications. When done correctly, particle size reduction favorably alters certain key physiochemical properties of the raw material(s). The success of a given process, such as emulsions and suspensions, often depends on precise size reduction.