Techniquies/Chemicals used to develop prints on nonabsorbent, porous, hard, and smooth surfaces.
1. To visualize fingerprints made on hard or non absorbent surfaces, the investigator typically applies a specialized fingerprint powder. Black powder which is composed of black carbon or charcoal is typically applied to white or light colored surfaces.
2. To visualize fingerprints on soft and porous surfaces , the crime scene investigator must use some kind of chemical treatment including: iodine fuming, ninhydrin, silver nitrate, and super glue fuming.
3. Florescent powders can be used to develop latent prints, these powders will florescence when viewed under ultraviolet light.
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I liked how you added more than one chemical to be used on developing fingerprints.
ReplyDeleteFor the powders, you're missing the information on how to develop prints on dark surfaces. You would use baby powder, which contains talk.
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