A variety of fingerprinting studies have been conducted on non-porous surfaces found at fire scene. However, there has been no study of non-porous surfaces contaminated with fire extinguisher powder used to fight scene. Therefore, in this study, a total of four types of non-porous surfaces heated at high temperatures over a period of time were contaminated with fire extinguisher powder, followed by CA dyeing, powder suspension, and fluorescent powder methods respectively. Experiments showed that CA dyeing was able to achieve relatively high scores. However, this showed that the evaluation score was generally lower than the patent fingerprint observed naturally by removing the digestive powder covering the surface of the heated sample with a rubber dust blower. Therefore, if non-porous surfaces contaminated with fire extinguisher powder are found at a fire scene, the patent fingerprint should be recorded first by carefully removing the fire extinguisher powder covering the surfaces before applying various fingerprinting techniques.