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Unit 4: Fingerprints

Unit 4: Fingerprints. 4.2 Fundamentals of Prints. D. Types of Prints. Plastic Indented or molded Found in things like soap, wax, gum Visible Blood, paint, ink, grease Latent Invisible Deposits of oil & perspiration Must be dusted. PRINT surfaces. Porous

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Unit 4: Fingerprints

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  1. Unit 4: Fingerprints 4.2 Fundamentals of Prints

  2. D. Types of Prints • Plastic • Indented or molded • Found in things like soap, wax, gum • Visible • Blood, paint, ink, grease • Latent • Invisible • Deposits of oil & perspiration • Must be dusted

  3. PRINT surfaces • Porous • Has pores or small holes • Examples • Paper • Fabric • Non-porous • No pores or small holes • Examples • Plastic • Glass

  4. Collecting Prints Recording Prints • rolling inked prints • primary identification number Lifting Prints • Black, white and fluorescent powder • Chemicals—ninhydrin, iodine, silver nitrate, cyanoacrylate Other Types of Prints • Palm, lip, teeth, eye, ear, voice, shoe and footprints Kendall/Hunt Publishing Company

  5. Fundamental Principlesof Fingerprints • A fingerprint is an individual characteristic. • A fingerprint will remain unchanged during an individual’s lifetime. • Fingerprints have general characteristic ridge patterns that permit them to be systematically classified. Kendall/Hunt Publishing Company

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