This pen marks on any fabric, wool, plastics, and other materials (but not on leather). It has one soft tip and one hard tip, both dispensing a vivid purple ink which will disappear completely within two to fourteen days of application, depending on the heat and humidity of the environment where used. Each pen is rated to mark approximately 1,200 linear yards.
LASHALL Magic Ball Pen Ink Invisible Disappear Slowly In Minutes Magic Gift 7ml(Buy 2 Receive 3)
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SHOW YOUR CHILD,GRANDCHILD, STUDENT, NEIGHBORHOOD FRIEND, HOW MUCH YOU APPRECIATE THEM WITH OUR INVISIBLE INK SECRET MESSAGE WRITER SPY PENEveryone
Invisible Disappearing Ink Pen Marker Secret spy Message Writer with uv Light Fun Activity for Kids Party Favors Ideas Gifts and Stock Stuffers, (12
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Write your secret message with these magic pens for kids! Light up the built-in UV light on the pen's cover to reveal the invisible ink - the secret
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Magic Vanishing Ink - Disappearing Ink Pen - SSS Corp.