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Calibration of Whiteness Meter

Feb 18,2021
The whiteness meter is suitable for the departments that need to measure the whiteness of the product, such as textiles, printing and dyeing, chemical fiber, plastics, porcelain clay, talc, white cement, coating, paint, ceramics, enamel, paper, pulp and other departments.
 
The modified color filter system is adopted that can quantitatively reflect the whiteness value after fluorescent whitening. With simple operation, it can accurately measure the opacity of the paper. It has the features of high stability and reproducibility, complete elimination of system drift error, and is equipped with data storage query function, which can meet GLP requirements. It adopts imported original components, with high-efficiency, low-loss switching power supply, reasonable and simple optical path design, and good reliability.
 
The calibrated whiteness meter mainly measures the whiteness of various objects such as paper and cardboard, pulp and chemical fiber pulp, cotton and chemical fiber, textiles, plastics, ceramics, porcelain, starch, salt, white cement, china clay, talcum powder, etc. It can also be used to measure optical properties such as the opacity of sheet materials.
 
1. Determine the brightness stimulus value Y10 of the sample, that is, the green diffuse reflection factor Ry.
2. Determine the opacity, transparency, light scattering coefficient and light absorption coefficient of the sample.
3. Determine the ink absorption value of paper and cardboard.
4. Determine the blue diffuse reflection factor (R457) of the sample, which is called "Blue Light Whiteness" or "ISO Brightness".
5. Analyze whether the sample material contains fluorescent whitening agent, and measure the fluorescent whiteness produced by fluorescent emission, that is, the whitening degree.
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