What is the correct orientation for capturing rolled fingerprint impressions?

What is the correct orientation for capturing rolled fingerprint impressions?

• A. Top to Bottom - Fingertip to 1/4 in below the first joint/crease
• B. Left to Right - Nail edge to Nail edge
• C. Diagonal from wrist to fingertips
• D. Circular motion around each finger

Answer: (B)

Rolling impressions are captured by moving each finger across the platen from one nail edge to the opposite nail edge, i.e., left to right across the finger. This orientation records the entire ridge pattern in one smooth roll and includes the ridges near both nail edges, which are essential for accurate comparison. Rolling from top to bottom or using diagonal or circular motions would not produce the standard rolled impression and could distort or miss portions of the fingerprint.

Rolling impressions are captured by moving each finger across the platen from one nail edge to the opposite nail edge, i.e., left to right across the finger. This orientation records the entire ridge pattern in one smooth roll and includes the ridges near both nail edges, which are essential for accurate comparison. Rolling from top to bottom or using diagonal or circular motions would not produce the standard rolled impression and could distort or miss portions of the fingerprint.