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Description
Product material: plastic + refill
Product size: length 13cm
Product weight: 10g
NOTE: we send random color of pen.
What is an invisible pen?
Invisible pen refers to the pen whose handwriting cannot be seen under normal light after writing, and can only be seen under the irradiation of ultraviolet light. It is generally used to mark items or to write statements that you do not want to be easily seen.
Instructions
First, use this pen to write anywhere, and then use the effect of ultraviolet radiation, heating, etc. to show the handwriting.
Note: Do not write too deep or you will leave marks on the paper.
The main function
1. You can write any of your secrets without being seen by anyone.
2. You can mark your items without destroying the appearance of the object, and at the same time you can easily distinguish it from other identical items.
3. When holding various exhibitions, make invisible marks to clarify the order of your equipment and items.
4. Short term tattoo can be done on your face or arm to be the focus of disco and pub.
5, As a gift to your friend, give him (her) a surprise.