This standard specifies test methods for the appearance of thermoplastic particles. This standard applies to thermoplastics such as polyethylene (PE), polypropylene (PP), polystyrene (PS), impact-resistant polystyrene (PS-I), acrylonitrile-butadiene-styrene (ABS), Natural granular resins such as styrene-acrylonitrile (SAN). This standard also applies to modified plastics. This standard does not apply to powders in thermoplastics.