Common methods of fingerprint show details characteristics of Handprint details characteristics of the judgement in the fingerprint examination in a very important position, but left in criminal cases in various objects on the fingerprint because it has been the scene of temperature, humidity at the scene, left over from the time show methods and the impact of various factors, so show Details of the fingerprint characteristics will happen some differences. Such differences are Feiben Zhi differences, the criminal will to a certain extent, the technical staff of confusing, thereby affecting the accuracy of fingerprint identification conclusions. I sweat through fingerprint powder commonly used methods show show, "502" plastic smoked significant way, Ninhydrin-show, smoked show of iodine in the printing paper, writing paper, wrapping paper, glass, metal, painted wood objects on the six handprint The experiments show, and samples and samples for analysis than the calculated Fei Benzhi points of difference in rates, differences in points of the causes, police discovered four methods commonly used fingerprints from fingerprints show details of the changes in characteristics and rates vary Fingerprint characteristics of the details of the rate of change as the fingerprint left by the time the increase in the rise of.