Development of coating materials requires preparation of coating materials. This machine can be used to disperse pigments rich in solid, designed for versatile uses such as paper making, production of inks, paints, and adhesive agents. The mixer’s saw-toothed impeller rotates forming a strong swirling flow to make the particles impact and rub against each other for effective distribution. The structure is simple and rugged, so it is possible to operate without trouble even under severe conditions and the user can do his or her work without failure. The container can be easily taken out, lifting the mixing head by turning the handle.