Latent and Patent Fingerprints: Identification Techniques

Latent Fingerprints

Invisible prints requiring special methods to reveal.

Inked Fingerprint

Direct impression of an individual's finger.

Friction Ridges

Skin patterns creating unique fingerprint designs.

Sweat Gland Secretions

Mixture causing latent fingerprint formation.

Blux Max Light

High energy light source for revealing prints.

Dusting Procedure

Technique to apply powder for print visibility.

Fingerprint Tape

Used to lift prints from surfaces.

Patent Fingerprints

Visible prints seen without special equipment.

Positive Transfer Impression

Visible prints from substances like blood or grease.

Negative Impression

Prints formed by removing surface material.

Soft Substance Impression

Prints made in materials like clay or paint.

Smooth Non-Porous Surfaces

Require dusting powder for print lifting.

Cyanoacrylate Fuming

Method for lifting prints from wet surfaces.

Rough Non-Porous Surfaces

Need cyanoacrylate for effective print recovery.

Small Particle Reagents (SPR)

Used for lifting prints from foam surfaces.

Visual Examination

Initial non-destructive search for fingerprints.

Photographing Prints

Documenting prints before and after lifting.

Processing Methods

Choice depends on surface type of prints.

Fingerprint Card

Document containing details about the fingerprint case.

Case Number Format

Starts with last two digits of the year.

Sketch Documentation

Records print location for future reference.