The Electrostatic Detection Apparatus (ESDA) is a highly sensitive, non-destructive instrument used primarily to detect and visualize indented writing on paper—text that is not visible to the naked eye. When someone writes on the top sheet of a pad, the pressure from the writing instrument can leave microscopic impressions (indentations) on the sheets underneath. ESDA works by placing the document on a vacuum platen, covering it with a thin polymer film, and applying a high-voltage charge. Toner particles are then applied and are attracted more strongly to the areas where the paper fibers have been compressed (the indentations), forming a visible image of the writing. This is especially useful in investigations where the original written message has been removed, but the impressions remain on underlying pages. ESDA is not used for ink analysis, chemical restoration, or direct handwriting comparison, though its findings can support those investigations.

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Zambia

• Joseph Soko – 101 pts

• Visual Pathway Lesions
• Positive and Negative Symptoms
• Hallucinations and Delusions
• Antipsychotic Medications
• Emergency: Environmental Emergencies