The EC added man-made vitreous silicate fibres to the list of hazardous substances in 1997, under EU Directive 67/548/EEC, which classifies refractory ceramic fibres (RCF) as category 2 carcinogens-substances which should be regarded as if they are carcinogenic to man. This classification has triggered a series of other regulations across the EU. Thermal Ceramics has developed its new bio-persistent fibre Superwool 607 HT to help fulfil the insulation user's RCF substitution obligations. Low bio-persistence means that any fibres inhaled which reach the lungs are rapidly removed by the body's natural mechanisms before they accumulate & cause harm. This is achieved by making the fibres from a glassy material which partially dissolves, corrodes & then fragments when it comes into contact with fluids found in the lungs.
