In order to study the effect of surface roughness and substrate material type on the adhesion of particles, measurements were made using the pendulum impact separation method using a variety of powders and substrates. Two methods were used to attach powder particles to a substrate : the free falling method and the fluidized method. When the powders were deposited on a substrate by free falling (with negligible force), the force of adhesion to the substrate with a rough surface was less than the adhesion to the smooth surface substrate. The degree of reduction in adhesive force increased as the shape of sample powder more closely resembled a sphere. When the powders were attached to a substrate under a fluidized state, a remarkable increase in adhesive force was observed in organic powder/polyvinyl chloride (PVC) systems. This is probady due to the electrostatic force produced by the collision and/or friction of particles to the PVC sheet.