Lip prints are another one of the most crucial evidence found on the crime scene which can help to put the criminal behind the bars and exonerate the innocent. Till now not much studies had been put forward on lip print but the time is changing and now this evidence is also being considered as an important part of investigation. In this paper, we choose two different surfaces which are porous (paper, sponge and fabric) and non-porous (wood and glass) on these surfaces to decipher the prints most generally used physical method i.e. black and white powder and chemical method which is iodine fuming. The sample size is around 100 lip prints collected on the surfaces. These samples contain both the male and female mixed lip prints. After the examination of the lip prints through these different methods the result was on paper the prints were partially developed, on sponge the prints were not developed and on the fabric the prints were again partially developed whereas on non-porous surface the prints were completely developed and on the varnished wood the prints were not developed. Fordecipherment of the prints on porous surface black powder is used and on non-porous surface on glass white powder is used and on varnished wood iodine fuming is used. The best result is observed with white powder i.e. with 75% on glass as surface.

Keywords: Lip prints; Development of lip prints; Black powder method; Iodine fuming.