The property of a powder to release fine particles from the bulk under certain stresses can be called dustiness. The release of dust into the surrounding air is usually undesirable for several reasons. On the one hand, it is associated with risks to the environment, fire protection and the health of employees in production or application. On the other hand, it can be associated with a loss of valuable materials. The dustiness can be measured qualitatively and often also quantitatively using various methods described below. These differ mostly in the way the powders are stressed. The dustiness is always determined by both the powder properties and the type of stress; it is not an intrinsic property. This is also clear from the treatment of the subject in standards and directives. And it is reflected in the treatment of dustiness in science and research. Several examples of completed and ongoing work are presented.