PROBLEM TO BE SOLVED: To establish a method for producing smooth flaky powder and to manufacture a high-brightness pigment utilizing the same.SOLUTION: The smooth flaky fine powder is prepared by crushing, and has 0.9-1.2 of powder size distribution coefficient defined in formula 1 below, based on an accumulated powder distribution measured by a laser diffraction scattering type powder size distribution measuring system, wherein the formula 1 is defined in the following. Formula 1: particle size distribution coefficient=(90% diameter-10% diameter)/50% diameter (median diameter).COPYRIGHT: (C)2008,JPO&INPIT【課題】 本発明の目的は平滑薄片状粉体の製造方法を確立し、その粉体を用いた高光輝性顔料を得ることにある。【解決手段】粉砕にて得た平滑かつ薄片状な板状粒子であって、レーザー回折・散乱式粒度分布測定装置による累積粒子分布測定値を基にした次式1:粒度分布定数=(90%径-10%径)/50%径(メジアン径) …式1に規定する粒度分布定数が0.9~1.2の粒子であることを特徴とする平滑薄片状粉体。【選択図】図1
