Production manner null of coloration pearl glossy mica

摘要

PURPOSE:To develop a colored nacreous mica pigment having a variety of color tones and interference colors by covering the surface of a nacreous mica material consisting of TiO2-coated mica by sputtering and reducing the TiO2. film to the low-order oxide. CONSTITUTION:A mica flake with the surface coated with a TiO2 film is charged into a rotary barrel-type sputtering chamber 2, a vacuum heat-treating chamber 1 is evacuated by evacuating systems 6 and 7, then Ar gas 19 is gradually introduced, the flake is simultaneously dispersed into primary particles using a fluid jet mill 3, and the particles are collected in the chamber 1. The TiO2-coated mica is transferred to the sputtering chamber 2 filled with Ar gas, sputtered at =200 deg.C to cover the surface with a Ti film and sent to a powder filter 4, and a red nacreous mica pigment is discharged. The ratio of Ti to O is changed on the mica surface in the film thickness direction, and mica pigments provided with a low-order Ti oxide layer having various color tones are obtained and used as the various colored paints.