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Marco Badalassi, iPool summarised trends in cables flame retardancy. The EU Construction Products Regulation brings new requirements for smoke density, non dripping and smoke acidity. Developments to achieve this cost-effectively are based in PIN flame retardants, including combinations of different mineral fillers (e.g. with calcium carbonate), coating of natural minerals, better particle size specification of minerals, coupling agents (e.g. silanes) and additives / synergists.