| In
August 2005, a new product was released by Ultonics Inc. Ultonics
took information from officers in the field and developed a
transparent, brown and white polyvinylsiloxane. The product
is called AccuTrans. The brown polyvinylsiloxane is ideal to
use for tool marks. The white polyvinylsiloxane can be used
to lift developed latent prints off various textured surfaces
such as computers, car dashes, refrigerators, bank counter tops
and Styrofoam for example. One must keep in mind that these
lifts using the brown and white have a reverse image.
This is where the transparent polyvinylsiloxane has numerous
advantages over the white and brown polyvinylsiloxane and other
similar products currently on the market.
1. The lift is transparent therefore the latent lift would not
be reversed.
2. The latent lift can be photographed through the transparent
polyvinylsiloxane.
3. The transparent polyvinylsiloxane can be inserted directly
into the AFIS system.
4. The latent lifts are permanent and will not rub off the transparent
polyvinylsiloxane.
5. The transparent polyvinylsiloxane is self pooling which is
ideal to use on flat surfaces.
6. With the use of the 1” wide spreader tip attached to
the mixing tip covers a single print perfectly, with a minimal
amount of material. Spreader Tip virtually eliminates operator
error.
AccuTrans
working and setting times:
Temperature |
Working
Time
(min.) |
Setting
Time
(min.) |
°C
/ °F |
|
|
-10
/ 14 |
12 |
32 |
0
/ 32 |
6 |
16 |
10
/ 50 |
3 |
8 |
20
/ 68 |
1:30 |
4 |
30
/ 86 |
0:45 |
2 |
To
get started with the AccuTrans System you can purchase a Intro
Kit, which includes:
2
- AccuTrans cartridges
1 - Dispenser
40 - Mixing Tips
10 - Spatulas
1 - Instructions
To
use simply insert a 75 ml double cartridge into the gun, put
on the special mixing tip and then squeeze the trigger. The
compound will come out through the mixing tip that is laced
with veins to mix the two compounds. When it comes out, the
compound is thoroughly mixed. When using the transparent polyvinylsiloxane
keep the mixing tip in the transparent polyvinylsiloxane as
it comes out of the mixing tip will eliminate the chance of
air bubbles. When using the brown or white polyvinylsiloxane
which has a heavier viscosity, apply it directly to the area
you want to cast and use the tip to stir the compound to remove
any air bubbles that may be trapped. Polyvinylsiloxane dries
in a relatively short time depending on the air and surface
temperature (see chart above). Your cast with the AccuTrans
polyvinylsiloxane will produce very fine detail casting or lifting.
Click here to view AccuTrans
with standard tip video.
Click here to view AccuTrans
with spreader tip video.
The
AccuTrans Intro Kit and components can be purchased
through the Lynn Peavey Company. |