Bullet‑Hole Identification Kit

The Bullet Hole Testing Kit (BTK) provides a rapid presumptive test to help confirm a bullet hole and indicate likely entry vs exit on clothing, upholstery and other surfaces. Using controlled colour‑reaction papers and reagents applied to the margins of the hole, BTK detects characteristic metal/propellant residues without cutting or damaging the item. Results are quick and easy to document, supporting on‑scene triage and evidence handling.

Why organisations choose BTK

• Entry/exit insight: detects residue patterns at the rim to indicate probable entry versus exit holes.
• Non‑destructive workflow: testing is performed on papers/swabs at the margins—no cutting and minimal disturbance.
• Fast, clear results: simple colour changes in seconds to minutes aid decision‑making on scene.
• Versatile surfaces: suitable for textiles, leather, upholstery, curtains, wall coverings and vehicle interiors.
• Evidence‑friendly: photographable outcomes, labels and notes align with chain‑of‑custody procedures.
• Compact & field‑ready: lightweight components with minimal training required.

How it works (typical workflow)

1. Isolate and photograph the suspected hole.
2. Position the supplied papers/swabs around the entry/exit margins as directed.
3. Apply reagents to the papers to develop colour reactions.
4. Observe and record the result; re‑photograph for the case file.
5. Package and label the item per your evidence SOPs.

Key specifications — Bullet Hole Testing Kit (BTK)

• Purpose: presumptive bullet‑hole identification and entry/exit indication
• Method: colour‑reaction chemistry on test papers/swabs applied to the hole margins
• Sample types: clothing, textiles, leather, upholstery, wall/door panels, vehicle interiors
• Time to result: seconds to minutes (visual colour change)
• Use & handling: non‑destructive, glove‑friendly, designed for scene documentation
• Storage: room‑temperature storage; check kit label for expiry
• Note: results are presumptive; submit items for laboratory confirmation per policy

Frequently asked questions

Does BTK prove that a shot was fired?

BTK provides a presumptive indication based on residue reactions. Confirmatory testing is performed by the laboratory.

Can it determine the direction of fire?

It gives a probable entry/exit indication from residue presence and distribution at the margins; always interpret with scene context and follow‑up testing.

Will it damage clothing or upholstery?

The kit is designed to be non‑destructive—reagents act on papers/swabs, not directly on the fabric.

What about washed or weathered items?

Laundering, weather and time can reduce residues and lower sensitivity; document item history and submit for lab analysis.