FRNSC 410 Lecture Notes - Lecture 4: Phosphorescence, Color Correction, Thermoluminescence
Document Summary
Enhancement: non-destructive (use this first!!, direct observation, photography. Illumination: videography, destructive enhancement techniques, physical enhancement, lifting to surfaces that produce contrast, electrostatic, gelatin and adhesive lifters, application of powder. Impression of wet origin on non-porous surfaces: conventional and magnetic fingerprint powders, fluorescent fingerprint powders, may be followed by. Illumination and photography with filters: gelatin or adhesive lifting, electrostatic detection of indentation, on paper/thin card stock, electrostatic detection apparatus (esda, vacuum box (vb) Indentation materializer (im: chemical enhancement, hundreds of different options, no going back, non blood impressions. Impression containing ca, mg, fe, al and other metals: 8-hydroxyquinoline and uv illumination, potassium or ammonium thiocyanate (fe only) Impressions containing caco3: bromphenol blue, waxy, oily, fatty, greasy, impressions. Impressions of wet origin or muddy impressions: safranin o. Illumination (light: electromagnetic spectrum, gamma rays, x-rays, uv, visible spectrum, ir, microwave, radio waves, long radio waves. Infrared (ir: 700 to 1x106 nm, detection of light.
