Arrowhead Forensics 2020 Catalogue

LATENT PRINT DEV
PHYSICAL DEVELOPER KIT
Physical developer is a silver-based aqueous reagent that reacts
with the components of sebaceous sweat in latent fingerprints
to form a silver-gray deposit. Physical developer is superior in
sensitivity to many silver nitrate products presently in use. It
can be used to develop latent prints on paper and other porous
materials. Normally, physical developer is used on latent prints
after they’ve been treated with ninhydrin. Just mix the solutions
and immerse documents in the mixture. Rinse and wait for
prints to develop. A technical information sheet and procedure
recommendations are included with each set, which includes A
and B solutions.
A-2622 50 ml Solution A, 1 L Solution B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .$80.50
NO
ALS
NO
FILTER
Chemical Shelf Life: 18 months
Working Solution: 5 days
THE PROCESS
Solution A
5 ml
20 ml
50 ml
Solution B
90 ml
360 ml
900 ml
SILVER NITRATE
Silver nitrate solutions are light sensitive and when they
combined with the salt deposits of latent print residue, they
will develop dark brown latents. Silver nitrate will stain most
materials, and the stain is extremely difficult to remove.
Prints developed with this method will not fade. On the contrary,
they will continue to develop when exposed to light. This
process works by having sunlight develop the impression
detail treated with the working solution. The technique has its
successes when used on wood surfaces that have not been
treated with wax or varnish finishes.
A-2674 8 oz Spray ..........................................................................................$33.20
NO
ALS
NO
FILTER
Chemical Shelf Life: 12 months
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• Phone: 1300 896 001 • Website: www.tacticalgear.com.au