 As health and safety has become more important to the environment and to the work forces, a small number of anti-set-off spray powder manufacturers had introduced highly clarified powders by 2007, in advance of EU legislation.This new generation of powders have typically less than 3% of particles of less than 10 µm and almost no particles below 5 µm which are generally regarded in the industry as dust.To put this in context typical human hair is 20 – 40 µm.