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DRY FILM THICKNESS GAGE, DESTRUCTIVE

An instrument used to measure the thickness of a dry coating film over metallic and nonmetallic
substrates. The measurement is made by cutting through the coating at a specific angle to its
surface and then observing the thickness of the coating layers through a microscope with a
calibrated lens as described in ASTM D 4138. Commonly called a Tooke gage or a paint
inspection gage (PIG).


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