Specialist Pigments
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Why are the study of tattoos of interest to forensic science?
• identification • tracking movement of people and animals
What is the issue with tattoos as evidence?
• colour perception • description of tattoos is open to interpretation • chemical analysis removes interpretation issues
What is the analytical workflow of specialist pigments based on the fact that they are made from organic or mineral pigments?
same with paints and other pigments 1. all microscopic techniques - understanding penetration depth and pigment distribution 2. IR - organic binders and pigments 3. Raman - inorganic pigments 4. SEM-EDX & XRF - elemental composition of layers 5. Pyrolysis-GC/MS & microchemical testing