kdjsic 18ml Non Carbon Magic Invisible Ink For Fountain Glass Dip Pen Creative Fluorescent UV Light Gift Stationery

Invisible ink can only be seen under the irradiation of ultraviolet lamp Ink will come with a mini UV light You can use glass pen, pen, feather pen It's great to draw or keep a diary You can also use it to record some important things, such as passwords or other things, which others find and think are blank