This British Standard applies to lead chromes for use in paints, both those consisting wholly of water-insoluble compounds of lead and those containing additions introduced specifically to improve certain pigmentary properties. It is not intended to apply to mixtures of lead chromes with other separately prepared lead compounds other than chromes nor to mixtures with extenders or diluents. The material shall be in the form of a dry soft powder or in such a condition that it may be readily reduced thereto by crushing under a palette knife, without necessitating any grinding action.