a scratch that is not visible to the unaided eye under fluorescent (diffuse) illumination but is visible to the unaided eye under incandescent (high intensity) illumination. [ASTM F1241] Contrast macroscratch.
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a scratch that is not visible to the unaided eye under fluorescent (diffuse) illumination but is visible to the unaided eye under incandescent (high intensity) illumination. [ASTM F1241] Contrast macroscratch.