The UV PEN TORCH also has many other uses:
It can be used for:
Checking whether a piece of Uranium / Vaseline Glass responds to a UV Light.
Identifying modern cloth and finding recent fabric repair in period costumes.
Detecting any repairs and defects in china, porcelain and other ceramics.
Writing invisible codes on valuables for police to identify stolen items.
Health & Safety checks such as cat and dog stains on carpets etc.
Checking for the Phosphor bands on collectable postage stamps.
Identifying the Property Marking Substance "SMART-WATER"
Identifying traces of some prohibited drugs such as Cocaine.