![]() ![]() This is right at the edge of the visible light spectrum, so you will see a purple glow cast from it, but it is a long enough wave to excite the fluorescent material and reveal the secret message. This is easiest to see in dim lighting conditions.Ī nice, compact source for UV light is a UV/Purple LED which emits light in the 400nm wavelength. Products are intended for business purchase / use and not for personal purchase. Write and decipher invisible secret messages and correspondence Use the UV-ink pen to write invisible. However, when illuminated with a UV light source (sometimes called a blacklight), it fluoresces brightly. Invisible Ink Pen With UV Light Magic Marker. UV light to find other objects and materials that glow. Ultraviolet marker pens use ink which lacks colour pigment, so it doesn’t leave a mark visible to the naked eye under normal lighting conditions. Quickly and easily write and view ‘secret’ messages.UV light also effective for checking bank note watermarks.FREE delivery Tue, 31 Oct on your first eligible. £899 (£0.56/count) Save more with Subscribe & Save. Built-in UV light for easy identification of marked items Toyseum 16 x Invisible Ink Pen With UV Light, Spy Pens for Writing Secret Message, Party Bag Fillers for Kids, Magic Secret Agent Pens for Boys & Girls Party Bags, Pack of 16 (8 Unique Colours) 22.Discreet, totally portable security solution Photoinitiators help in making UV ink it is a substance that absorbs the UV light fulfilling the role of an UV-activated invisible ink pen.Perfect for the little spy in your household! ![]() The UV Security Light Pen can be used to check for watermarks on bank notes and other documents, and the pen used to invisibly mark documents or bank notes or to write ‘secret’ messages. A perfect party gift allowing your children to be really creative with their writing, sketching and drawing.Shine the light on the writing spot to see the message appear like magic!.They can use the UV pen to uncover secret messages.Ĭhildren love forensic spy games and these pens make a perfect addition to any spies collection box. This invisible ink spy pen is a perfect gift for children. This spy pen lets you write secret messages which are only revealed by the built in UV light! ![]()
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