Due to their low cost, light weight, resistance to corrosion, and general versatility, plastics have established a significant presence in many different industries. It is important to determine the material properties of plastics in order to characterize their expected behavior in real-world applications. One important property is the relationship between stress and strain while a plastic sample is being bent or flexed: in other words, the flexural properties of the material. To regulate an internationally standardized method for determining this property, the International Organization for Standardization (ISO) developed ISO 178.