The wonders of Black Light Ink/Pen

Ever wondered why Black light ink pens are invisible? It is because black light ink pens have ultravoilet compounds in them that are not only extremely bright but are can also be only viewed under black light.  Black light pens throw a bright blue and a black light that also usually includes UV flashlight. The best aspect of black light inpens is that under normal light you will not be able to see what you have written. The ink is only visible under a UV or a black light which is emitted at the range of atleast 390 nm light range. The ink is permanent in nature. You can write with these pens on almost any kind of substance whether it is paper, wood, skin or plastic. Although the ink does not wash on any other kind of material but if you will wear it on your skin it will eventually wash off.

If is the light of your pen is blue in color the it will appear as blue when light is thrown over it but if its white then it will appear as white. Normally black ink pens are used to write access controls at special events and  clubs. Also, they are commonly used to write the security codes. Many a times, people also use them to mark their personal belongings or to scribble secrets on their diaries.