It is imperative for a forensic identification specialist to know how to enhance a weak blood print or impression thereby optimizing the value of the evidence. This study tested four different reagents (Amido Black, Leucomalachite Green, Hungarian Red, and Crowle’s Double Stain) against one another on seven different surfaces, ceramic tile, drywall, linoleum, melamine board, laminate wood floor, ceiling tile, and rough wood. The evaluation of blood enhancement chemical was based on a subjective analysis of bloody fingerprint or palmprint impressions. All four of the tested blood enhancement reagents were acceptable for scene use. Each chemical tested indicated improved contrast and ridge detail on most of the surfaces. The testing indicated that Amido Black provided the best overall results. It was found to be user friendly and on average was superior to the other chemicals used. All four blood enhancement reagents were found acceptable for field use. It was noted that other blood enhancement chemicals were also available. References