Abstract: This invention relates to a process for the rehydration of tissues, comprising obtaining a tissue sample, heating a solution of tissue enhancing solution that does not contain flammable or toxic fluids or compounds to 35-70° C., exposing the tissue to the warm solution, and waiting for a period of time for the tissue to rehydrate and the ridge line details to be returned substantially to normal. As a result of this process, excellent fingerprints, hand prints, sole prints, lip prints, and the like can be obtained. Further, improved tissue clarity results from the rehydration process allow for the appropriate analysis using standard forensic techniques.