Superglue Technique
- Requires chamber for development (Fish tank, automobile)
- Non-Porous surfaces
- Develops white
- If using accelerant, caution: evidence is HOT when removing. Wait until reaction is complete and cooled down.
- Superglue is mostly attracted to old superglue. Keep chambers clean.
(Trash Bag)- Evaporation
- Containment
- Absorption
- Polymerization - turns print into plastic
Types of Cyanoacrylate Methods:
- Regular - no accelerant
- Accelerant - Hot Shot: cotton ball drenched in Baking Soda (Sodium Bicarbonate) + Water + few drops of liquid Cyanoacrylate
- Gel pad
- Vacuum
Accelerant with Hot Shot
Heat Accelerant + Gel Pad
Vacuum ChamberPROS -
- Effective results
- simple to use
- low cost
CONS -regular
- Messy
- Slow (2 hours to 2 weeks) if without accelerant
- Not practical for field use
- Caustic chemicals - irritates mucous membranes and eyes
- Short shelf life
- Rapid burst of fumes
- Not cost effective
CONS (with hotplate)
- Messy
- Not practical for field use
- overdevelopment is a concern
- Iodine Fuming
- Ninhydrin
- Porous surfaces
- Place items into sealed chamber. Add glue
- Add humidity source. Cup of warm water for smaller chamber and multiple liter containers of water for automobiles. Size of water source dependent on area of chamber. Keep water 3" from evidence.
- Fume at least 10-30 minutes for 10 gallon fish tank depending on use of accelerant. 20-40 minutes for gel, 2-4 hours for automobiles.
- Remove and study under oblique lighting. Vacuum method may require oblique lighting.
- Ventilate and Photograph.
- Dye print. If powder is used, use AFTER photography to prevent damage to print.
rooms - 30 minutes
cars - 10 minutes
small chambers - 2 to 3 minutes
Recommended Surfaces: metals, leathers, purses, plastics and plastic bags, cash drawers, vinyl, aluminum cans, rubber, gun grips, electrical tape, colored paper, glass
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