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Chapter Sixteen – Paint Analysis. FRSC 7104 Criminalistics I Professor Bensley. FRSC 7104 – Chapter 16 Objectives. After studying this chapter, the student should be able to: Recognize paints and coatings and their manufacturing processes
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Chapter Sixteen – Paint Analysis FRSC 7104 Criminalistics I Professor Bensley
FRSC 7104 – Chapter 16 Objectives After studying this chapter, the student should be able to: Recognize paints and coatings and their manufacturing processes Understand how paint is collected at a crime scene Describe the analysis of forensic paint samples Explain the interpretations of the analyses of forensic paint samples
FRSC 7104 – Chapter 16 Outline • Introduction • Definition of Surface Coating • Questioned vs. Known Samples • Questioned Sampling • Known Sampling • What is Paint? • Various components Paint Manufacturing Process Automotive Paint Video
FRSC 7104 – Chapter 16 Outline • Automobile Paint • Surface Preparation • Primer • Basecoat • Clearcoat
FRSC 7104 – Chapter 16 Outline • Procedure for Analysis • Sample Description • Physical Match • Sample preparation and layer analysis • Solvent/microchemical tests • Polarizing light microscope • Spectroscopy
FRSC 7104 – Chapter 16 Outline • Procedure for Analysis • Pyrolysis GC • Microspectrophotometry • SEM-EDS • Other techniques Chapter Summary • Forensic analysis of coating is an important part of many investigations • Chemically complex samples that are straightforward to analyze and yield distinctive results