Posted By Leo26 Paul, Having had experience working in industries that use large quantities of HF, I agree that it is very dangerous....especially in the hands of mindless idiots. Where do these taggers get their supplies of HF from? Leo26

Posted By Bob Youel if I remember my chemistry properly the problems start under the skin first and then materialise outside afterwards hence making it very very dangerous can anybody provide more detail!

Posted By John J Couple of pointers - All HF burns are serious no matter how small – AHF burns are immediately obvious and painful – DHF burns can have delayed effects (up to 24 hours) HF is absorbed through the skin and can affect the electrolytes within the blood which can cause: – Pulmonary Oedema (liquid on the lungs) leading to: – Respiratory failure (even without inhalation) – Cardiac arrest (heart attack) – Long term liver function damage An exposure equivalent in size to the palm of the hand can be fatal Its also present in a surprisingly wide variety of guises including dry cleaning products, car valeting products and alloy wheel cleaner. John

Posted By John J The artists have a habit of leaving the bingo dabbers (used to hold the HF) lying around which leads to cleaning staff picking them up and burning themselves.