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Fingerprinting Techniques

1. How can I ensure that I capture the highest quality fingerprints?

Answer: Remember the Three C’s:

Claw: Be sure the applicant’s hand is FLAT on the scanner and not shaped like a claw. All fingers should be together, hand flat, placed about ½ inch below the upper edge of the glass on the scanner.

Core: Obtaining detail and minutia features from the fingerprints will increase the quality of the prints. Be sure the applicants’ fingers are flat with the ‘meaty’ part of the finger (not the fingertips) directly on the scanner.

Clarity: Prints that are too light or too dark will significantly affect the quality. When looking at the prints on the inVizeID software you should be able to clearly see the details of the arch, loops, and whorls of the fingerprints.

2. What should I do if an applicant has very light fingerprints?

Answer: As we age our fingerprints become lighter and more difficult to capture. Additionally, individuals working in certain industries experience dry, cracked hands. Ask the applicant to rub a small amount of the BIM scan gel onto their fingerprints prior to capturing the prints. If scan gel is not available, or if the applicant has extremely light prints apply a very small amount of Corn Huskers Lotion to the fingerprints and rub it in thoroughly prior to capturing the prints.

3. What should I do if an applicant has very dark prints because of warm or moist hands?

Answer: Individuals with warm or clammy hands will cause what is known as ‘haloing’ around the fingerprints. Haloing is a result of the fingerprint scanner capturing the radiant heat coming from the hands. A product known as Parkers Perfect is designed specifically for reducing the hallowing affect on scanner. Rub a Parkers Perfect towelett or spray a small amount directly onto the glass of the scanner. Once completely dry, capture the applicants prints again. If the prints are still dark, rub an alcohol-based spray or pad onto the applicants fingertips and capture the prints again.