Paint and glass examination Flashcards
What is required in optical microscopy to indicate a match between paint samples?
Six or more matching layers between the known and recovered paint
What is analysed about paint samples using infrared microscopy?
Each layer to gain information on binder types and fillers/pigments
What is the purpose of UV-Vis analysis in paint?
Objective colour comparison
What is SEM/EDX analysis for paint and what is its purpose?
Involves shooting electrons onto the surface and analysing the resulting x-ray emissions to detect elements in the paint
What is measured in the identification of glass samples?
Hardness, structure and behavior under polarised light
What is compared in preliminary glass tests?
Colour, surface characteristics, flatness, thickness and fluorescence
How are dry soil samples stored?
In airtight containers, plastic bags or film cannisters
How are wet soil samples stored?
In paper or cloth sacks to allow the water to evaporate
What is homogenizing soil and what is the purpose?
Crushing the soil to obtain a consistent particle size so the samples represent the bulk exhibit
