PAINT EVIDENCE

1
PAINT EVIDENCE

• Nature of Paint Evidence
• Collection of Paint Evidence
• Laboratory Analysis of Paint Evidence

2
NATURE OF PAINT EVIDENCE

• What is paint?
• Paint
• Classification of paint
• Drying oil types
• Solvent types
• Synthetic emulsion types
• Pigment Classification
• The most common

3
COLLECTION OF PAINT EVIDENCE

• Photograph evidence
• Cut out the portion with paint missing.
• Collect large, loose deposits or chips of paint
  using tape.
• Obtain paint smears. Chipping and scrapings
  should be put in a druggist fold.
• Collect known standards for comparison.
• What is a known standard?
• When toolmarks are present collect paint samples
  directly adjacent to toolmarks so they are not
  damaged.

4
LABORATORY EXAMINATION

• Physical characteristics
• Control samples
• Microscopic examination
• Physical match
• Microchemical test
• Chemical properties
• Instrumental methods