Home > News

What is the whiteness meter?

Whiteness meter, also known as brightness meter, whiteness tester, whiteness tester, etc, What is used to measure the blue whiteness of the surface of objects, and the measurement results are displayed on the LCD screen. It is widely used for measuring the whiteness of paper and cardboard, pulp, textiles, printing and dyeing, chemical fiber, plastic, porcelain clay, talcum powder, white cement, coating, paint, ceramics, enamel and other departments that need to measure the whiteness of products.


The instrument uses the integrating sphere to achieve the measurement of absolute spectral diffuse reflectance, the light from the tungsten halogen lamp, through the concentrating mirror and color filter into a blue-violet light, into the integrating sphere, the light in the inner wall of the integrating sphere after diffuse reflection, irradiation on the test port specimen, the light reflected by the specimen through the concentrating mirror, light bar filter group received by the silicon photocell, converted into an electrical signal. Another way silicon photocell receives the substrate signal inside the sphere. The two electrical signals are amplified and mixed separately, and the measurement results are displayed digitally and printed by the built-in printer. 

The whiteness meter can determine ISO whiteness (ISO Brightness, that is, R457 whiteness), fluorescent whitening of the specimen, but also to determine the fluorescence of fluorescent substances emitted by the whitening degree. Measurement of brightness stimulation value Y10. Measurement of Opacity. Determination of transparency. Determination of light scattering coefficient and absorption coefficient.


Related news