3.5.12. Masking Workmanship – Line Definition: Line definition is the extent to which the actual masking line deviates from the drawing specified line. The edge of masked area may be uneven and is acceptable provided the total variation is no greater than 0.020 inch.3.5.13. Black Light Inspection: No fluorescence, fibers or particles shall be observed on surfaces exposed to black light by the examination method described in 4.5.11. These criteria are not applicable to pre-final-cleaned parts.