Patent ID: 6835409
Filing Date: 2004-12-28
Classification: A61B,G06K

Abstract:
A method of recording prints of a person's fingertip, palm or foot comprising:a) providing a thermosensitive recording surface containing a thermosensitive color developing layer, the layer comprising a chromogenic dye, an organic acid developer reactive with the dye to develop a color and a thermosensitive barrier for separating the acid from the dye; b) applying a solution of a chemical compound containing monohydrogen and/or dihydrogen esters in a liquid state, the compound having an AAV value of about 9 or more, to the fingerprint, palm print or foot to be printed; and c) depositing the solution from the ridges of the fingerprint, palm print or footprint pattern area to the recording surface whereby the chemical compound reacts with the dye to provide a colorant product representative of the ridge pattern of the finger, palm or foot of said person.