The surface textures of the plastic pellets could be clearly illustrated in SEM images.Thus, 5 items of each type of virgin plastic pellet and weathered plastic pellet were studied by scanning electron microscopy (SEM) on a JEOL JSM-6510 microscope.Because the surface textures of the weathered plastic pellets were heterogeneous, visualization was repeated at different surface sites (at least three relatively smooth or rough sites; Wang et al., 2017).In addition, comparisons of the changes in the surface textures of virgin plastic pellets and weathered plastic pellets were carried out.