| 摘要 |
A method for the production of lamellar pigments by a vacuum deposition process is described. The method involves the deposition of a thin layer of sodium fluoride release-substrate material upon a suitable condensing surface, e.g., a moving polyester web, and the deposition thereon of a thin film of lamellar pigment-producing material. The resulting lamellar pigment material is removed from the condensing surface by dissolving the sodium fluoride release substrate material in a substance, e.g., water, which is a nonsolvent for the lamellar pigment material. The material is fragmented into lamellar pigment particles for utilization in a number of applications where the light-reflective properties of such pigment materials are desired. The utilization of a sodium fluoride release layer permits more efficient control of the rate of deposition of the desired release layer and provides lamellar pigments of desirable specular reflectivity.
|
