Fingerprint Identification

The recommended height for recording legible fingerprints is approximately 39 inches from the floor. This allows the forearm of an average adult to be parallel with the floor. This is the recommended position to record fingerprints.Soap and water are preferred; however, rubbing alcohol may be substituted.If hands are moist, wipe each finger with rubbing alcohol. If hands are dry or flaky use a small amount of hand lotion and wipe off any residue.If capturing fingerprints electronically, ensure the live scan fingerprint device is properly calibrated and the platen is free of dust, dirt, and any residual fingerprint images.The individual’s hands should be cleaned prior to printing:Instruct the individual to look away from the fingerprint device, not to assist in the fingerprint process, and to relax. Grasp the individual’s right hand at the base of the thumb with your right hand. Cup your hand over the individual’s fingers, tucking under those fingers not being printed. Guide the finger being printed with your left hand.If using the ink and paper method, roll the finger on the inking plate or pad so the entire fingerprint pattern area is evenly covered with ink. The ink should cover from one edge of the nail to the other and from the crease of the first joint to the tip of the finger. Using the correct amount of ink is vital.When taking the rolled impression, the side of the finger bulb is placed upon the card or platen. The finger is then rolled to the other side until it faces the opposite direction. Care should be exercised so the bulb of each finger, from tip to below the first joint, is rolled evenly. Generally, the weight of the finger is the maximum pressure needed to clearly record a fingerprint. In order to take advantage of the natural movement of the forearm, the hand should be rotated from the more difficult position to the easiest position. This requires the thumbs be rolled toward and the fingers away from the center of the individual’s body. Roll each finger from nail to nail in the appropriate space, taking care to lift each finger up after rolling to avoid smudging.