The Spray

Invisible to the eye. Undeniable under forensic UV.

An aerosol that marks an attacker with UV-reactive ink, colourless, odourless and unfelt, while simultaneously triggering the full Safety Ink evidence suite via Bluetooth.

Safety Ink Spray
How it works

One press. Three things happen simultaneously.

The moment the valve opens, the chemistry, the Bluetooth, and the evidence chain all fire at once, faster than any attacker can react.

01

UV compound releases

The forensic-grade UV compound bonds to keratin in skin and fabric fibres on contact. Colourless, odourless, completely unfelt. The attacker has no idea they've been marked.

02

BLE trigger fires

The Bluetooth module in the cap broadcasts before the spray cloud has settled. Your phone receives the signal from a locked screen, no interaction needed, no unlock required.

03

Evidence begins

Audio, GPS, front-and-rear cameras and trusted circle alerts all activate simultaneously. A complete forensic record is already building before the attacker can leave the scene.

The UV science

Completely invisible. Completely undeniable.

UV-reactive Safety Ink glowing on an attacker under forensic light
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The compound

UV-reactive photoinitiator in IPA carrier

Safety Ink uses a proprietary blend of UV-reactive photoinitiator compounds in an isopropyl alcohol carrier, the same forensic marking technology trusted by police forces worldwide. Bonds to keratin in skin and fibres in fabric on contact. Zero irritation, zero colour under white light.

365nm fluorescence

The forensic standard used in every custody suite

Photoluminesces at high intensity under 365nm ultraviolet, the standard wavelength used in every UK custody suite, SARC and forensic lab globally. The mark is instantly photographable under standard police UV torches. Court-submissible photography within minutes of arrest.

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Persistence

3–14 days on skin. Weeks on fabric.

Persists 3 to 14 days on skin under typical conditions, significantly longer on fabric, surviving multiple washes in many cases. The attacker has no physical reason to seek medical attention or suspect marking has occurred. The court-submissible evidence window begins immediately.

Safety profile

Non-toxic, non-irritating, legally defensible

Formulated to meet cosmetic-grade skin safety standards. No burning, stinging, or discolouration under normal light. Not classified as a weapon under UK law. Safe to carry and legal to use in self-defence, unlike pepper spray or other aerosols.

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The Bluetooth trigger

Works from a locked screen.
In under a second.

The cap contains a compact BLE module. The moment the aerosol valve opens, it signals your phone, activating the full evidence suite before the spray cloud has settled. You don't need to touch, unlock, or even hold your phone.

<1s
Trigger to evidence start, before an attacker can react
30m
BLE range: fires even if phone is in your bag or pocket
Months
Standby battery life: replaceable cell, always ready
Get Safety Ink

The spray that works silently.

Available at safety.ink and selected retailers. Download the companion app free.