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|Surface Used On:
Development Complete When:
Source of Error:
(Not necessarily in this order.)
Abridged Reagent Sequence
*** Nickel nitrate ***
NICKEL NITRATE FORMULA:|
3 g Nickle nitrate dissolved in 300 ml Ethyl ether. Use magnetic stirrer until completely dissolved.PROCEDURE OF APPLICATION
NINHYDRIN TREATED ITEMS: 1. Spray the item lightly. 2. Air-dry the item. 3. Process & dry a second time. 4. Oven bake at 80 - 100 degrees C at 65% humidity for 20 minutes. 5. View under a forensic light source around 530 nm. A fluorescent color is not produced, but the absorbed light may yield better detail.
Ridge Detail Visualized by:
Visible chemical/stain reaction.
Forensic Light Source induced.
Other Chemical Name(s):
Nickel nitrate is applied as post-ninhydrin treatment in order to improve the contrast of the ridge detail for viewing and photography. Two methods may be applied, the background may be made to fluoresce, or, the treated ridge detail may be made to absorb green-colored light around 530 nm.
Supporting Reference Materials:|
1. Advances in Fingeprint Technology 2nd. Ed., Lee, H.C. & Gaensslen, R.E., CRC Press, Boca Raton, FL., 2001.
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