Microscopic and Spectral Analysis of Paint Chips
To characterize and compare paint chips by color and composition.
A variety of automotive paint chips, some of similar color. Find a junk yard and obtain samples from automobiles whose paint is peeling. Store the chips in plastic bags, and assign chips to each suspect and to the crime scene.
Standard Reference Material
Optical microscopy (structure, layers)
Visible, diffuse reflectance spectrophotometry (color)
Infrared, diffuse reflectance spectrophotometry (composition of resin coating)
Optical microscope, Visible spectrophotometer with diffuse reflectance accessory; FT-infrared spectrophotometer with diffuse reflectance accessory