The UV invisible ink is used in many bars and night clubs. With this ink, you can create unique entry stamps, but you can also use it when organising party games, e.g. for hiding surprises in a room.
Alternatively, you can draw or stamp patterns on your skin before going to a club! This ink is thin and will only be visible in the UV light, so you can spread it on your skin hours before the party starts. When watched closely, you may be able to see the liquid with your bare eye, but in a bar or a party, it will not be spotted.
The advantage of the UV invisible ink is that it shimmers and becomes accentuated from the surface. A normal ink has a matte effect on many surfaces.
One sufficient bottle has 50 ml of liquid. You can use regular stamps with it. Alternatively, you can spread the ink with a brush.
The ink may discolour some surfaces. Because it is ink, it can also stick tightly to a surface (e.g. textiles and paper).