The disclosure describes a method of making flaked metal powders having a narrow particle size distribution, a whiter color and a very high sparkle effect. A heterogeneous liquid system comprising an inert liquid and a lubricant and including a finely divided metal is subjected to attrition in an enclosure...http://www.google.es/patents/US4172720?utm_source=gb-gplus-sharePatente US4172720 - Flaked metal powders and method of making same
