Paint 0.0 / 5 ? CriminologyForensic StudiesUniversityOther Created by: AshleeCreated on: 03-05-15 20:58 What are 3 types of paint? Water based, automobile and oil based 1 of 23 What is the solvent for water based paints? Water 2 of 23 How do water based paints work? Binder polymerises and hardens as dries, forms film and holds to surface 3 of 23 What is the solvent for oil based paints? Mix of hydrocarbons 4 of 23 How do oil based paints work? Solvent evaporates and dries 5 of 23 How would you collect paint at the scene? Control sample; small flakes 1cm2 onto paper; whole item; large flecks with tweezers 6 of 23 What are the 4 components of automobile paint? Electro coat primer; primer surface; basecoat and clearcoat 7 of 23 What is an electrocoat primer for? Corrosion resistence 8 of 23 What is a primer surface for? Smoothness 9 of 23 What is a basecoat for? Enriched colour 10 of 23 What is a clearcoat for? Protection 11 of 23 What is the forensic value of paint? Make/colour/year of car; links object to victim; links object to crime scene; physical matches; layer analysis 12 of 23 What is the primary pigment of blue & green? Organic compounds 13 of 23 What is the primary pigment of white? Titanium dioxide 14 of 23 What is the primary pigment of black? Carbon 15 of 23 What is the primary pigment of green? Chromium oxide 16 of 23 What is the primary pigment of orange? Cadmium sulfide 17 of 23 What is the primary pigment of brown/red? Iron oxide 18 of 23 What is a pigment? Finely ground insoluble particle 19 of 23 Why is a pigment used? Colour, durability and hardness 20 of 23 What is a binder? Non-volatile liquid which binds pigment particles together 21 of 23 How would you analyse paint? Microscope; chemical reactions; fluorescence microscopy; infrared microspectrophotometry; scanning electron microscopy with x-ray microanalysis 22 of 23 What characteristics would you look for when analysing paint? Size; shape; colour; thickness; surface condition; layer sequence 23 of 23
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