Fingerprint and Other Impressions

Loops are the most common fingerprint patterns, accounting for 60%-70% of all patterns, where ridges enter from one side of the finger, make a U-turn around a central point (core), and exit on the same side of the finger. This characteristic U-turn of the ridge is called a “recurve”.  However, all U-turn patterns are not

11 Rules of Choosing and Identifying Core in Loop Fingerprint Patterns Examination of loop fingerprint patterns starts with identifying the core. In general, the core is considered the center point in a fingerprint pattern. In any case, a fingerprint expert has to follow some sets of rules to assign an area in the fingerprint as

Forensic fingerprint experts follow a set of rules for comparing fingerprints. But in this simple guide, I will show you how you as a teacher can create a fun activity for their students who have no prior knowledge of comparing fingerprints. For this forensic fingerprint comparison school activity, you don’t need any sophisticated tools. The

Amido Black, also known as Acid Black 1, is an acid diazo dye used by forensic fingerprint experts to detect and enhance latent blood marks. Amido Black stains proteins forming a dark blue-black colored product. It is the most widely used protein stain dye for the development of bloody fingerprints on both nonporous and porous

Ridge counting is a technique that involves counting the intervening ridges present between the core and delta of a fingerprint. In essence, this method quantifies the ridges between these two reference points, helping to categorize fingerprints based on their ridge counts. Ridge counting is mostly used for loop patterns. For arches, ridge counting is generally

Ridge tracing in fingerprint is used to obtain the classification value for Whorl by drawing an imaginary line from the extreme left to right delta and then counting the intermediate ridges. The techniques depend upon the establishment of the focal points of the deltas and then tracing an imaginary line between them. What is the