The ASTM D7378-2016 standard provides a standard practice for measuring coated powder Film thickness to predict film thickness after curing. The standard contains three methods: Method A uses a metal scale (comb ruler) for manual measurement of powder Film thickness; Method B uses a magnetic or eddy current coating thickness meter; and Method C uses a non-contact ultrasonic powder Film thickness instrument. These methods help to set up and fine-tune the coating system before the curing process, reduce waste and excess lame plating, accurately predict curing coating thickness, and avoid adhesion and coating integrity problems caused by disbonding and recoating. The standard emphasizes the accuracy of measurement and the importance of predicting curing coating thickness.