for Creative with UV Light Fluorescent Record Secret Information Festival Party Prese Bottled Stamps

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