The results are reported in or Joules. A common result might look like: "Passes 160 in-lb Direct Impact."
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The test utilizes a specialized apparatus known as a variable-height impact tester. The process involves dropping a weighted indenter from a specific height onto a coated metal panel. The kinetic energy of the falling weight deforms both the coating and the substrate, creating a hemispherical indentation. The results are reported in or Joules