The purpose of this seminar. To evaluate the efficacy in detecting latent fingerprints on the paper type with 15 1,2-indanedione. The ninhydrin The check latent fingerprints on paper, thermal paper, which include ATM. Receipt paper Paper and fax method playoff iodine, ninhydrin method and 1,2-indanedione. To compare the efficacy in detecting fingerprints on paper. The result How 1,2-indanedion Effective in detecting latent fingerprint on paper, 15 species have better ways of ninhydrin in thermal paper in the playoff iodine is extremely effective. Then develop a method to detect fingerprints. To make visible the latent fingerprint on the paper surface more clearly. Which will be beneficial to the individual's probation in a criminal case.