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The Risk Free Security Pigments 
 

 LehMo-Flo  and  LehMo-Glow  
 

LehMoSense  GmbH produces risk free pigments for security inks.

Using our photoluminescent pigments, you create and with naked eye, users can view the hidden security mark (color) under invisible UV light or view the fading color after switching off the UV or visible light.

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LehMo-Flo Pigments

Our LehMo-Flo products are photoluminescent pigments/phosphors suitable for use in security inks. They emit unique color of light under ultra-violet (UV) light. The emitted color is invisible in ambient light. UV pigments are generally used as security marks on banknotes and other important documents that need protection against counterfeits. Importantly, all LehMoSense's products do not contain rare-earth elements whose production destroy and pollute the environment. Additionally, our products to not contain toxic substances hence safe for handling. The images below represent our three pigment samples.

Images of the pigment samples under ambient light (left), under UV light (middle) and their respective photoluminescence emission spectra when excited by UV light of  wavelength 365 nm.

LehMo-Flo Security Paper

Photo image under ambient light

Photo image under UV light

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We offer printable UV fluorescent security paper that is coated with our pigments. The paper is tough and waterproof. It is suitable for printing many secure documents such as bank cheques, certificates, title deeds, notary documents, ballot/voting  paper, passports, identification documents, tickets or labels.

Sample in

ambient light

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UV ON

UV OFF

(afterglow decay)

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UV A

(lamp)

UV ON

UV OFF

(afterglow decay)

Near

UV B

(LED)

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UV ON

UV OFF

(no afterglow)

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UV C

(lamp)

Three for One!

Our LehMo-Glow 02 phosphor offers three unique security features for maximum product protection.

Emits light of different colors for UV A and UV C illumination

LehMo-Glow-Green

Observe different colors for UV A and UV C illumination

Use our special phosphor

for your product protection

against counterfeits

Emits different color of afterglow after UV light is  switched off

The afterglow light has a unique decay time constant

that third parties can't copy

LehMo-Glow quarantees benefits in inform of:

  • Best price/performance ratio

  • Secured supply chain

  • Best environmental protection (No rare-earths and toxic materials)

Afterglow excited by visible light

Most  materials show afterglow property only when illuminated by UV light and not by visible light. This limits further applications since UV light is unsafe. Furthermore, the afterglow from most materials do not perform well at temperatures above 30 degrees Celsius. Our LehMo-Glow samples overcomes the above mentioned drawbacks since the afterglow is excitable by visible light (including white light) and the afterglow is observable by naked eye even at higher temperatures upto  40 degree Celsius. Please see the images below.

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Contact us, for more information. We can produce custom sample for your applications. Our samples can also be excited by visible light including a flash of a mobile phone. Get in touch, we are actively looking for partners to innovate together.

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