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Development Color:
Vertical Divider
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Method to Record:
Vertical Divider
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Hazard:
Vertical Divider
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Protective Clothing:
Vertical Divider
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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
Similar Reagent
Sequential Reagent
Formula
Not Applicable Procedure of Application
A. Simple ambient light. B. Absorbed light (filter out background color). C. Reflected light. (for greasy impressions). D. Oblique light (for dust impressions). E. Transmitted light (on transparent surfaces). F. Directed light (to subdue surface texture). Development Complete When
All the item's surfaces have been examined. Source of Error
Handing items (by handles) in their normal manner may obliterate or smudge visible detail. Incompatibilities
Not applicable. Precautions
Ascertain that items do not have liquid or loose components that may spill if the item is subjected to maneuvering. Storage Container
Not applicable. Safety
Beware of sharp corners and pointed items, or, contents that may spill. Recommendations
Adjusting the source, angle, and illumination intensity may produce better visualization results. Similar Reagent
Sequential Reagent
Not Necessarily in this Order: Vertical Divider
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Chemical Name
Visual Examination Surface Used On Non-Destructive for all surfaces Sensitive To Reflected & Absorbed Lighting Vertical Divider
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Ridge Detail Visualized by:
Visible Stain Reagent Applicabilities: Porous Surfaces Non-Porous Surfaces Other Chemical Name(s): Ambient light Natural light Absorbed light Reflected light Directed light Oblique light Transmitted light |
Process Summary:
A non-destructive technique to note the presence of visible detail. Several natural and artificial sources, and angles of light may be utilized in order to best visualize any detail that is present.
A non-destructive technique to note the presence of visible detail. Several natural and artificial sources, and angles of light may be utilized in order to best visualize any detail that is present.
Accepted Deviations:
Adjusting the source, angle, and illumination intensity may produce better visualization results. Numerous lamps, colored filters, fiber optic guides, liquid light guides and forensic light sources can be utilized.
Adjusting the source, angle, and illumination intensity may produce better visualization results. Numerous lamps, colored filters, fiber optic guides, liquid light guides and forensic light sources can be utilized.
Supporting Reference Materials:
- Advances in Fingeprint 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 Development Branch, White Crescent Press, Ltd., Luton, England, 2001.