Method for forming multilayer coating film

Abstract

A method for forming a multilayer coating film, the method including the following steps (1) to (3): (1) applying a colored paint (X) to a substrate to form a colored coating film whose lightness L* value in the L*a*b* color space is 5 or less, (2) applying an effect pigment dispersion (Y) to the colored coating film formed in step (1) to form an effect coating film, and (3) applying a clear paint (Z) to the effect coating film formed in step (2) to form a clear coating film, wherein the effect pigment dispersion (Y) contains water, a rheology control agent (A), and a flake-effect pigment (B), the flake-effect pigment (B) being an effect pigment in which a transparent or translucent base material is coated with a metal oxide, and the effect pigment dispersion (Y) having a solids content of 0.1 to 15 mass %; the obtained multilayer coating film has a Y value (Y5) of 50 or more, the Y value (Y5) representing a luminance in the XYZ color space based on spectral reflectance when light illuminated at an angle of 45 degrees with respect to the multilayer coating film is received at an angle of 5 degrees deviated from specular reflection light in the incident light direction; and the obtained multilayer coating film has a lightness L* value (L*25) of 25 or less in the L*a*b* color space when light illuminated at an angle of 45 degrees with respect to the multilayer coating film is received at an angle of 25 degrees deviated from specular reflection light in the incident light direction.

Dependencies are inferred from the claim text.