Latent fingerprint detection

摘要

Latent fingerprints can be detected and visualized by application to the suspected locale, of a solution, in a volatile organic solvent of selected silver salts soluble in said solvent. Suitable salts include silver perchlorate and silver trifluoroacetate. The solution is preferably applied as a spray. This non-aqueous solution minimizes smudging, "running", warping and other damage to water-sensitive material (usually inks, dyes and/or cellulosic substrates).