Abstract
AbstractA Collaborative Programme of work was carried out by two laboratories to asscess a procedure for identifying paint systems which possess poor ‘in service’ lives by virtue of being repeatedly washed. The small scale surface spread of flame apparatus as described in BS 476 part 7 was used to measure any change in the surface spread of flame characteristic of eight coating system, applied to two substrates, as a result of washing the coated surfaces. The results indicate that both laboratories ranked the paints in the same order and the reproducibility of the proposed washing procedure was good. The most consistent results were obtained when the coating systems were applied to standard hardboard. It is suggested that flame retardant coating system having poor resistance to washing would be identified if a limit of changes of average spread of flame were set at 75 mm. This investigation was carried out in support of the activities of BSI committee PVC/12, Fire Retardant Paints.
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