A colloid mill is a machine that is used to reduce the particle size of a solid in suspension in a liquid, or to reduce the droplet size in emulsions. Colloid particles are tiny liquid droplets, which are attracted to the spinning action of the rotor. This attracts even more droplets, and so on until the whole suspension becomes a colloid. It is useful for the emulsification of solids (water, fat, and other fluids) which are too large in volume to be dissolved in a solvent solution. Colloid Mill Mixers can be used to increase the emulsification of such solids. Also, colloid mixes can be used for the separation of solids which are not soluble in a solvent, such as dried fish oil, from oily fish oil which is not suitable for animal feed.
