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Development Color:
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Method to Record:
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Hazard:
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Protective Clothing:
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Fume Hood Use:
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Formula
Procedure of Application
Development Complete When
Source of Error
Incompatibilities
Precautions
Storage Container
Safety
Recommendations
Sequential Reagent
Formula
500 ml Sodium hypochlorite in 500 ml distilled water Procedure of Application
Development Complete When
Darkening of the ridge detail visualized with Physical developer, and a lightening of the background is noted. Source of Error
The item must first be pre-treated with Physical developer. Incompatibilities
This process cannot preceed the use of Silver nitrate. The item must first be pre-treated with Physical developer. Precautions
The item must be thoroughly rinsed after immersion into the working solution, else deterioration of the item may occur. Storage Container
Dark or Clear stoppered glass or plastic bottles. Safety
Fume hood use is not essentially required for preparing and applying the working solution. Recommendations
This process is especially effective for brown paper bags and for currency. Sequential Reagent
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Chemical Name
Sodium Hypochlorite Surface Used On Porous Surfaces Sensitive To Physical Developer Enhancer Abridged Reagent Sequence
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Ridge Detail Visualized by:
Visible chemical/stain reaction Reagent Applicabilities: Physical developer enhancement Porous sufaces Post-Ninhydrin Wet surfaces Other Chemical Name(s): None Working Solution Shelf-Life: Indefinite |
Process Summary:
A process for darkening the ridge detail visualized by Physical developer. It also lightens the stained background and removes ninhydrin stains. This process is especially effective for brown paper bags and for currency.
A process for darkening the ridge detail visualized by Physical developer. It also lightens the stained background and removes ninhydrin stains. This process is especially effective for brown paper bags and for currency.
Accepted Deviations:
None listed.
None listed.
Supporting Reference Materials:
- Advances in Fingerprint Technology 2nd. Ed., Lee, H.C. & Gaensslen, R.E., CRC Press, Boca Raton, FL., 2001.
- Manual of Fingerprint Development Techniques 2nd. Ed., Home Office - Police Scientific