Check-tile for colour measurement instruments

A check-tile for validating instrument scales of a color measurement instrument, said check-tile comprising a non-transparent substrate coated with a multi-layer coating, said multi-layer coating comprising:

• a. a pigmented ground coat, wherein said pigmented ground coat is disposed above and in contact with the substrate and is opaque and made of a base coat coating composition Ia comprising a binder and at least one achromatic solid pigment, and
• b. a pigmented mid-coat, wherein said pigmented mid-coat is disposed above and in contact with the pigmented ground coat and is translucent and made of a base coat coating composition IIb comprising a binder and at least one transparent interference pigment, and
• c. a pigmented top coat, wherein said pigmented top coat is disposed above and in contact with the pigmented mid-coat and is transparent and made of a top coat coating composition comprising a binder and at least one transparent or semi-transparent solid color 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 transparent or semi-transparent solid color 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.