Re-surfacing Testing

Laboratory Process Guide 2023

RE-SURFACING TESTING

NMP (N-Methyl-2-

pyrrolidinone)

Equipment: Chemical, beaker, hotplate

Destructive?: Yes

Duration: PR9 30 mins – AS6081 45 mins

Description: This test is conducted to verify the absence of blacktopping. This is an aftermarket method of re-marking with the aim to pass off one part as another or to falsify the date code and other vital information.

The device is submerged in 115°c NMP for five minutes. When the time is up, the device is removed from the beaker and swiped with a cotton bud with the intent to see whether the surface is removed.

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