Wednesday, November 16, 2011

Fingerprinting: Procedures for Collecting/Lifting Prints

There are three common lifting methods for fingerprints:
Hinge lifters-


  • Come in lots of color backgrounds (for visualization of prints with different powders)
  • Placed on print and pressed evenly
  • Lifted print is covered with hinged cover and is protected from scratches and dirt while being retained in original form

Rubber lifters-



  • Plastic cover is removed fast so no lines are left on top
  • The adhesive side of tape is applied to powdered print and pressed evenly
  • Peel the tape away from surface
  • Plastic cover is replaced on tape over print to protect it
  • Print appears in it's negative (opposite) form


Cellophane Tape-

  • For surfaces that aren't flat
  • Attaches to contours to avoid bumps
  • A bit of tape is folded over to use as tab for handing 
  • Print area is covered about an inch beyond in the other direction
  • Gently rub tape over print
  • Once in place, print is lifted by pulling roll away from surface
  • Quickly apply tape to card and cut away excess 
  • Lifts prints in correct position (not reversed)



1 comment:

  1. Good details and concise writing . You may want to include pictures of the materials listed.

    ReplyDelete