standard color palette

Standard whiteboard is a standard whiteboard included in the standard color palette, made of ceramic material, used for calibrating or verifying colorimeters and other colorimetric instruments. It has a wide range of applications in papermaking, textiles, building materials, printing and dyeing, printing and other fields.

According to the application field, it can provide spectral reflectance factors in the wavelength range of 380nm~780nm, as well as CIE standard illumination bodies A and D65, CIE1931 standard chromaticity observer (2 °), and CIE1964 standardThe three stimulus values X, Y, Z and chromaticity coordinates x, y under the field of view of the chromaticity observer (10 °); CIE1976 brightness L *, coordinates a *, b *, and color metrics such as saturation and hue angle in the CIELAB color space.

The uncertainty of the measured values on the standard whiteboard is U (Y)=1.6 (k=2); U(x),U(y)=0.0044，（k=2）。 (0/d condition)

The uncertainty of the measured values on the standard whiteboard is U (Y)=2.0 (k=2); U(x),U(y)=0.0054，（k=2）。 (d/0 condition, 0/45 condition, and 45/0 condition)

Ceramic based series standard whiteboards have certain spectral selectivity, high surface hardness, and stable optical performance. Easy to clean, suitable for use as a calibration whiteness meter.The spectral reflectance ρ (λ), tristimulus values X, Y, Z, and chromaticity coordinates x and y are measured and determined by qualified metrology institutes. Every year, timely inspection and calibration of standard whiteboard values should be carried out.