Screen the whole scene don't ever miss a critical evidence again.

STK Spray

Screen the whole scene 
Never leave an evidence behind

What is STK Spray?

STK Spray is the first screening solution that enables a sharp localization of sperm traces directly on the rape scene, whatever the suspected material but textile (floor, furniture, door handle, sink, tree leaves, grass, gravels…).

STK Spray disrupts current procedures by instantly and reliably detecting semen traces directly on the scene.

AXO Science’s goal is to empower Police forces with leading technologies by bringing this new tool to the very hands of Crime Technicians on site and allow a complete screening of a rape case.

Stop wasting time with tons of false positives and never leave a crucial evidence behind again.

Results are very promising, sperm dog to locate the area and STK Spray to find the sperm traces in the last square meter, it looks like a very efficient team work.

Aki Salonen - Central Police Dept, Crime Scene Investigation Unit, Tampere (Finland)

The initial trial of using STK Spray went well. Seminal fluid fluoresced as expected.

Health Science Authority (Singapore)

Both the STK Lab and Spray worked very well. I tested the products on undilute semen stains on a laminate tile and two dark polyester fabrics. The fluorescence was quickly and clearly visible.

Sam - Houston State University (USA)

Available products

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Sprayer

Spray bottle to be used with STK Spray & STK Skin

UV Goggles

Transparent goggles with UV filter to be used when using UV light

How to use STK Spray?

Dilute 1 sachet of STK Spray in 100 ml (~3 US fl oz) of demineralized water
1

Dilute 1 sachet of STK Spray in 100 ml (~3 US fl oz) of demineralized water

Spray the scene at distance of ~20 cm (~8 inches)
2

Spray the scene at distance of ~20 cm (~8 inches)

Read results with a 365nm UV light with visible light filter: only semen stains will glow in a blue color
3

Read results with a 365nm UV light with visible light filter: only semen stains will glow in a blue color

Frequently Asked Questions

Is STK Spray toxic?

STK Spray is not toxic but should not be sprayed on a living person. For living person, use STK Skin.

Is STK Spray damaging DNA?

No, STK Spray is not damaging DNA and is fully compatible with extraction techniques.

What surface can I spray with one pouch of STK Spray?

It all depend the surface you are screening and its absorption. We can estimate a normal consumption being around 10 m2 (107 ft2) for 1 pouch.

How long can I use the STK Spray solution once diluted in water?

24h, protect it from sunlight.

Can I use any sprayer?

You can use any sprayer that is doing a fine mist and avoid big drops of waters.

Can I spray on clothes?

You must not as there are many settings that prevent an effective signal on clothing when using STK Spray. In addition, using STK Spray on a textile garment will then give poor results with STK Lab. For textiles, use STK Lab.

Can I use any UV light?

No, you have to use a 365nm UV light with visible light filter. Not every 365nm UV light give great results, please use a positive control to validate your UV light. We can recommend some specific 365nm UV lamp if needed.

Documentation for download