Patent ID: 8908183

Claim:
A check-tile for validating instrument scales of a color measurement instrument, said check-tile comprising a transparent substrate coated with a multi-layer coating, said multi-layer coating comprising: A) a pigmented mid-coat applied to the transparent substrate, wherein said pigmented mid-coat is translucent and made of a base coat coating composition I comprising a binder and at least one transparent interference pigment, and B) a pigmented ground coat, wherein said pigmented ground coat is opaque and made of a base coat coating composition II comprising a binder and at least one opaque solid colored pigment; wherein said check-tile is of a color suitable for measurement by said color measurement instrument according to a photometric scale and a wavelength scale; wherein at least one reflectance spectra of said check-tile measured within a range of 70° to 115° off the specular is predominated by the color of the at least one opaque solid colored pigment; and at least one reflectance spectra of said check-tile measured within a range of 10° to 20° off the specular is predominated by the color of said at least one transparent interference pigment.