Invisible UV Pen 1,Conform ASTMD-4236,EN71,6P,Lead 2,OEM client' logo 3,Ink can be seen only under uv/black ligh ... conform international tests standards,EU and US standards.Material PP Pen tip bullet fiber tip Ink colors Invisible color Logo one ... clothes,furniture,leature and so on.Ink visible only under uv/black light. Other Similar Product pictures for your reference: If you ...