Crystal Violet

• Used to develop fingerprints on Adhesive Surfaces
• Reacts with sebaceous Lipids/Fats
• Stains proteins from dead skin cells
• Opaque, dark background staining is main concern from technique
• Effectiveness varies depending on type of tape/adhesive surface
• If tape is on glass, Freeze the tape before removing to prevent damage to fingerprint
• best on Non-Porous surfaces
• Stains. Wear gloves
• Develops Purple
• Also known as 'Gentian Violet'

(Clear Tape)

Types of Application:

1. Dipped

(Duct Tape)

PROCEDURE:

1. Immerse/Dipp in solution for 1-2 minutes. Wear gloves!
2. Cold water tap rinse 30 seconds
3. view with ALS if required using red goggles
4. Dry.
5. Photograph. Print is not lifted to prevent damage.