Periodic evaluations can and should be used to chart the degradation over time. These inspections are a crucial part of any comprehensive testing program.
Although Visual Evaluations are subjective, they are extremely vital, for it is often the individual end user’s perception that will determine whether a material’s appearance is satisfactory. Visual Evaluations must be repeatable and must be consistent with other people’s perception. Because consistency is critical, Visual Evaluations must be done by a trained and experienced inspector.
When a customer requests a Visual Evaluation of a test specimen, the inspector will check for all observable defects, including color, hazing, cracking, scaling, crazing and chalking.