MULTILAYERED FILM-COATED POWDER AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To obtain a multlayered film-coated powder produced by carrying out the film thickness design of each coating film so as to increase reflection intensity of light at a specific wavelength and correcting spectrophotometric characteristics for monitoring the film thickness so as to provide the designed film thickness when the substrate is a powder and to provide a method for producing the powder. SOLUTION: This multilayered film-coated powder and the method for producing the multilayered film-coated powder are characterized in that the film thickness of respective coating layers is determined so as to provide a maximum value or a minimum value to the value of the reflection intensity R (λ) of the multilayered film-coated powder obtained by correcting the multilayered film reflection intensity Rflat in the case of a multilayered film-coated platy material in which the material of the substrate particle, the number of the coating layers, coating order of the respective coating layers, the material of the respective coating layers and a desired reflected light wavelength are selected by the shape and the particle diameter of the substrate particle at the desired wavelength and the production is carried out so as to provide the determined value of the film thickness in the multilayered film-coated powder having at least the two coating layers different in refractive index on the substrate particle and is capable of reflecting light at the specific wavelength and the method for producing the multilayered film-coated powder.