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Evaluating The Ability Of Different Weak Acids When Combined With Hydrogen Peroxide To Develop Latent Fingerprints On Post-Fired Cartridge Cases, Casey Nicholas Oleksa
Evaluating The Ability Of Different Weak Acids When Combined With Hydrogen Peroxide To Develop Latent Fingerprints On Post-Fired Cartridge Cases, Casey Nicholas Oleksa
Graduate Theses, Dissertations, and Problem Reports
This study examined the effectiveness of different weak acids in developing fingerprints on different types of cartridge cases when combined with hydrogen peroxide due to a process known as chemical etching. Chemical etching involves an oxidation-reduction in which the metal is oxidized by the acid. Three types of cartridge cases were used: bi-metal, brass, and aluminum. Five different acids of varying pKa were used: acetic, citric, lactic, maleic, and propanoic. Each acid was made up to a different concentration to reflect the same pH as 1.0M H+ ions. Phase I involved testing each acid with each case printed after firing …