Patent ID: 8922775

Claim:
A check-tile for validating instrument scales of a color measurement instrument, said check-tile comprising a non-transparent colored substrate coated with a pigmented coating, wherein (A) said non-transparent colored substrate is colored with at least one achromatic solid pigment, and is coated with a pigmented mid-coat I, wherein said pigmented mid-coat I is translucent and made of a base coat coating composition I comprising a binder, at least one transparent interference pigment and at least one transparent or semi-transparent colored solid pigment, 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 transparent or semi-transparent colored solid 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, or (B) said non-transparent colored substrate is colored with at least one opaque solid colored pigment, and is coated with a pigmented mid-coat II, wherein said pigmented mid-coat II is translucent and made of a base coat coating composition II comprising a binder and at least one transparent interference pigment, 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; 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.