Poroscopy is a personal identification method. In Poroscopy, the characteristics features of sweat pores on palmar and plantar surfaces are examined and studied.
Edmond Locard discovered and perfected the methodology in 1912. It has been noted by Locard that pores, like ridges and their ridge characteristics, are permanent, immutable, and unique. It entails the investigation of pores evident in fingerprints and impressions left at a crime scene. When the impression isn’t good enough for comparison, the expert uses poroscopy as a second method of identification which means, they can be used to determine the identity of individuals when ridges are not available to provide sufficient characteristics.
Some important points of Poroscopy are following:
(1) Each mm of fingerprint ridge contains 9-18 pores
(2) They are unique in size, shape, extent, position and number in a given individual
(3) Pores are permanent and do not change during life
(4) Useful when only fragments of fingerprints are available.