“…Included in the figure is the range of fibre diameters before fire testing, and this was between 5 and 7.5 m. It is seen that the fibre diameter after fire testing is between 1.5 and 7.5 m, with about 60% of the total fibre population being small enough to be inhaled deep into the lungs. The inhalation toxicity of carbon fibres has been studied extensively over twenty years [59][60][61][62][63][64][65][66][67][68][69][70], and Gandhi et al [59] give an excellent review of the topic. Most toxicological and epidemiological studies have focussed on the occupational health of factory workers who manufacture carbon fibres.…”