The appropriate application of this procedure is for examination of products for "Macro-type"
defects rather than for "Micro-type" defects, which may also be present in any product.
Consequently, relatively low power magnification values have been specified for optical
instruments, and nonspecialized measurement instrument usage is intended. Do not apply this
procedure to critical defects or product features that cannot be reliably detected and
evaluated by the apparatus referenced in this test method. For those instances, utilize
another test method that provides more suitable procedures or establish a new method
specific to that requirement.