UV light is also useful for detecting counterfeit bank notes. Simply use the pen to make a distinguishing mark and use the UV light to make checks. Invisible ink pens are great for marking all kinds of surfaces and applications, especially paper.
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Markal Paint-Riter® Valve Action®. Formally know as Markal Valve Action Liquid Paint Marker. Walters & Walters Ltd - Industrial Marking Specialists. Plus an Invisible Ink for Security Marking, Tamper-Proofing and Anti-Counterfeiting.
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UV light is also useful for detecting counterfeit bank notes. Simply use the pen to make a distinguishing mark and use the UV light to make checks. Invisible ink pens are great for marking all kinds of surfaces and applications, especially paper.
eBay
eBay
UV light is also useful for detecting counterfeit bank notes. Simply use the pen to make a distinguishing mark and use the UV light to make checks. Invisible ink pens are great for marking all kinds of surfaces and applications, especially paper.
eBay
Not visible to the naked eye turn the UV light on the writing appears! Great for parties and children's get together's or sleepovers. With built in Ultra Violet (UV) Light. Ideal for Marking valuables.
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UV light is also useful for detecting counterfeit bank notes. Simply use the pen to make a distinguishing mark and use the UV light to make checks. Invisible ink pens are great for marking all kinds of surfaces and applications, especially paper.
eBay
1 Invisible Ink Marker Pen. Colour: Silver. Words visible under the UV light. Battery: Built in 3 AG3 Button Cell. Use the pointer to point at the words you write and you can see them clearly. Light weight and portable.
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