Germaglo Powder Green. Germaglo Powder is safe and non-toxic invisible UV fluorescing powder used by some of the leading care homes groups in the UK as well as the NHS. Trainers use this product to create strong visual message on the ease of germ transfer between objects and people. For classroom and training environments, students often pass around one of our GermaGlo balls to show how easily inter-personal germs can transfer. Germaglo hand wash powder will fluoresce brightly under UVA blacklight. Full instructions and handy advice notes are supplied with this item. suitable UV light device is required.