The instrument is mainly used to measure the whiteness of various objects such as paper and cardboard, pulp and synthetic fiber pulp, cotton and synthetic fiber, textiles, plastics, ceramics, pond porcelain, starch, salt, white cement, porcelain clay, talcum powder, etc. It can also measure the optical properties such as opacity of thin sheet materials.

1. The measurement of the diffuse reflectance factor of blue light (R457) of the sample is called "blue light whiteness" or "ISO brightness".

2. Analyze whether the sample material contains and can determine the fluorescence whiteness generated by fluorescence emission, i.e. whitening degree.

3. Measure the brightness stimulus value Y10 of the sample, which is the diffuse reflectance factor Ry of green light.

4. Measure the opacity, transparency, light scattering coefficient, and light absorption coefficient of the sample.

5. Measure the ink absorption value of paper and cardboard.

Whiteness meter, also known as brightness meter, whiteness tester, whiteness tester, etc. in China, is widely used in papermaking, textile, printing and dyeing, plastics, ceramics, enamel, grain, building materials, paint, chemical industry, salt and other production and inspection departments that need to measure specific whiteness. The instrument can also measure the transparency, opacity, light scattering coefficient, and absorption coefficient of paper.