Industrial Color Physics

Color characterization of coatings with diffraction pigments

“…When the direction of the grooves is perpendicular to the incidence plane, ΔG can be expressed as [11]:…”

“…Previous experimental studies on coatings with diffraction coatings have been recently published, showing the color travel of these coatings in CIE a*,b*-diagrams [11,12]. Interestingly, theoretical simulations can be found in literature [13], giving insight in the dependence of the spectral reflectance on the period of the diffractive grating and its amplitude.…”

Colour of Stone Slabs under Different Standard Illuminations

“…The aim was to record the spectral data directly reflected from the surfaces -to simulate the behaviour of the samples during a standard visual inspection, and to make a comparison between theoretically calculated values and the results of the corresponding real measurements. A Gretag Machbet Colour Box was used to produce D65 (similar to solar light), Illuminant A (typical incandescent source) and TL84 (typical fluorescent source) [5] spectra (Fig. 1).…”

Enhancing the chroma of pigmented polymers using antireflective surface structures

“…The specular component was included in the measurements. This configuration, typically denoted d∶8 [15], simulates daylight conditions in a situation with no direct light sources and near to normal observation. This configuration is chosen to include the specular contribution to the observed reflection in the color evaluation since this is a major contribution to the color changes described here.…”