Whiteness Color Tester
JH –BS-A Whiteness color tester is used to determine the whiteness, yellowness, color and color difference of objects, but also to determine the paper opacity, transparency, light scattering coefficient, light absorption coefficient and ink absorption value.
The instrument is widely used in papermaking, printing, textile printing and dyeing, ceramic enamel, building materials, chemical industry, grain, salt and other industries to determine the whiteness, yellowness, color and color difference of objects, but also to determine the paper opacity, transparency, light scattering coefficient, light absorption coefficient and ink absorption value.
Standard： GB 7973
Parameter:
1. Analog D65 body lighting.CIE1964 supplementary chromaticity system and CIE1976 (L*a*b*) color space formula were used
2．Geometric conditions were observed by d/o illumination. The diffuse ball has a diameter of 150mm, and the measuring hole has a diameter of 25mm
3．Measuring repeatability：σ（Y10）＜0.1，σ（X10、Y10）＜0.001
4．Accuracy：△Y10＜1.0，△X10（△Y10）＜0.01
5．Sample size：The test plane is not less than Φ30mm,thickness not exceeding 40mm
6．Power：170～250V,50Hz,0.3A
7．Working conditions: temperature of 10 ~ 30 ℃, relative humidity less than 85%
