| Make foodmate.com your Homepage | Wap | Archiver
Advanced Top
Search Promotion
Search Promotion
Post New Products
Post New Products
Business Center
Business Center
 

AOAC Official Method 974.35 Detection of Fingerprints (Latent) on Objects

PDF
  • Published: 2013-09-24
  • File Format: PDF
  • Views: 102   
  • Size: 33.6K
  • Language: English
  • Download Times: 551
enter the download page
Introduction
AOAC Official Method 974.35 Detection of Fingerprints (Latent) on Objects
Powder Brushing Method
First Action 1974
Final Action 1975
(Applicable to development of latent images deposited on nonporous surfaces within 120 h and not subjected to extreme temperature
or humidity changes.)
Pour small amount fingerprint powder (Hi-Fi Volcano, Sirchie Fingerprint Laboratories, Inc., Gravelly Hollow Rd, Medford, NJ 08055, or equivalent) into shallow dish or onto piece of paper. Pick up small amount with end of camel hair brush. Hold brush over surface to be dusted, and tap handle lightly to permit powder to drift onto surface. Brush surface lightly until image begins to appear.

Continue with light strokes, following ridge direction in pattern as it forms. Apply additional powder, if necessary, to obtain good contrast, but retain ridge detail. When sufficient detail and contrast are obtained, remove excess powder with ostrich feather duster. Preserve image by photographing and then taping over, leaving tape in place if practical. If not, pull off tape slowly and evenly, and place on 3 in (7.6 cm) ´ 5 in (12.7 cm) card of contrasting color.
 
 
[ Documents search ]  [ ]  [ Notify friends ]  [ Print ]  [ Close ]

DOWNLOAD URL
0 in all [view all]  Related Comments
 
more..Related Documents
Featured Documents
Top download this topics
Popular download
 
 
Processed in 0.023 second(s), 15 queries, Memory 0.67 M
Powered by Global FoodMate
Message Center(0)