Wetwop - Black 250 ml
Wetwop is a pre-mixed liquid that produces excellent friction ridge
detail when used to develop prints on any adhesive surface such as
masking, duct, clear, cellophane, brown packaging and nylon reinforced
tape.
Background:
Wetwop is used to process the sticky-side of adhesive tapes and labels
for latent prints. As with any chemical process, we suggest that you
experiment on non-evidence items to become familiar with this process
before using it on evidence.
Safety:
As with any new chemical process, read and understand the Material
Safety Data Sheet on all the chemicals involved. Practice normal
industrial hygienic procedures of wearing lab coats, protective gloves,
and goggles, if there is any risk of splashing the solution into the
eyes.
Equipment:
Wetwop is applied to the adhesive side of tapes with a camel-hair brush.
Components:
Wetwop is a ready-to-use suspension, no mixing or additives needed.
Wetwop can be used on the following adhesive surfaces:
Duct tape
Adhesive bandages
Paper-backed labels
Masking tape
Plastic surgical tape
Clear plastic tape
Packing labels
Double-sided foam tape
Reinforced packing tape
Cloth surgical tape
Adhesive edge of 3M™ Post-it® notes
Frosted plastic tape
Black electrical tape (due to poor contrast)
Wetwop –
White was developed to process dark colored and clear adhesive
surfaces. The solution will stain the residues of the fingerprint
deposited on the adhesive surface. In some instances, both black and
white solutions can be used in sequence to present a contrast for better
visualization of the prints
Examination:
A visual examination of the evidence should be conducted prior to any
chemical processing. Any foreign material should be collected in
accordance to laboratory procedures. If the tape is wadded or stuck on
another surface, efforts should be made to remove and expose the
adhesive surface without destroying the adhesive side. Once that is
accomplished, a second visual examination should be conducted. Any
evidence of ridge detail should be photographed prior to processing. To
process the tape, shake the bottle thoroughly. Pour a small amount in a
clean beaker or dish. Using a small camel-hair brush, apply Wetwop to
the adhesive side of the tape with a painting action. Completely cover
the surface. Let the solution sit on the tape for about 15- 30 seconds.
Rinse the solution off the tape with a gentle stream of tap water. Once
the tape is rinsed, set aside and allow to air dry. Do a visual
examination and photograph the results.
Photography:
Photography of latent prints developed with Wetwop should not pose any problems.
TECHNICAL NOTES:
Some paper labels and tapes and labels with dried-out adhesives Some
contact papers or shelf papers Wetwop – Black was developed to process
the adhesive surfaces of all colors. The solution will stain the
residues of the fingerprint deposited on the adhesive surface. The
solution has little background staining.
Ordering Information:
1-0271 ………… Black Wetwop, 100ml
1-0272 ………… White Wetwop, 100ml
1-0077…………… Black Wetwop, 250ml
1-0078…………… White Wetwop, 250ml
FS-BRC1.5…… Camel-hair Brush
Ships within 14 days. Special order items may take longer.
Any questions call 714-979-1405 or email us at Sales@HittMarking.com