TC-BD48A Whiteness Tester

(Also known as whiteness meter or brightness meter) Primarily measures the whiteness of various materials such as paper and paperboard, pulp and chemical fiber pulp, cotton and chemical fibers, textiles, plastics, ceramics, enamel, starch, salt, white cement, kaolin, talcum powder, etc. It can also measure the optical properties of thin materials, such as opacity. This instrument complies with GB3978-83; standard illuminant and illumination observation conditions. It simulates D65 illuminant lighting. Adopts d/o illumination observation geometry conditions, with a diffuse sphere diameter of 150mm, test aperture diameter of 30mm, and equipped with a light absorber to eliminate the influence of specular reflection from the sample. The spectral power distribution of the R457 whiteness optical system has a peak wavelength of 457nm and a half-bandwidth of 44nm. The Y10 optical system complies with GB3979-83; method for measuring object color. It measures and digitally displays whiteness, fluorescent (brightening) whiteness, opacity (%), etc.  

1. Measures the blue diffuse reflectance factor (R457) of the sample, referred to as "blue light whiteness" or "ISO Brightness".

2. Analyzes whether the sample material contains fluorescent brightening agents and can measure the fluorescent whiteness generated by fluorescence emission, i.e., the degree of brightening.

3. Measures the brightness stimulus value Y10 of the sample, i.e., the green light diffuse reflectance factor Ry.

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

5. Measures the ink absorption value of paper and paperboard.

TC-BD48A Whiteness Tester

1. The instrument adopts an integrated design of optics, mechanics, and electronics, with microcomputer measurement and control technology, compact structure, aesthetically pleasing appearance, and convenient maintenance.

2. Features statistical analysis and processing functions for test data.

3. Wide testing range, capable of testing various objects' whiteness (brightness), opacity, transparency, light scattering coefficient, and light absorption coefficient.

4. Chinese graphical menu display operation interface, simple and convenient operation.

GB/T  7933-87    Method for determination of diffuse reflectance factor of pulp, paper, and paperboard (d/o method)

GB/T  7974-87    Method for determination of whiteness of paper and paperboard (d/o method)

GB/T  8940.2    Method for determination of pulp whiteness

GB/T  1840    Method for determination of industrial tuber starch

GB/T  2913    Test method for whiteness of plastics

GB/T  13025.2    General test methods for salt industry, determination of whiteness

GB/T  1543-88    Method for determination of opacity of paper

GB/T  10339-89    Method for determination of light scattering coefficient and light absorption coefficient of paper and pulp

GB/T  5950    Method for measurement of whiteness of building materials and non-metallic mineral products

ISO  2470    Method for determination of blue diffuse reflectance factor of paper and paperboard

ISO  2471    Method for determination of opacity of paper and paperboard

Textile industry standards: Method for determination of whiteness of pulp for chemical fibers, etc.

1. Zero drift: ≤0.1

2. Indication drift: ≤0.1

3. Indication error: ≤1

4. Repeatability error: ≤1

5. Specular reflection error: ≤1

6. Sample size: Test plane not less than Φ30mm, sample thickness not exceeding 40mm

7. Power supply: AC220V  50Hz  0.2A

8. Operating environment: Temperature 0℃～40℃, relative humidity not exceeding 85%

9. Dimensions: 365mm×260mm×425 mm

10. Weight: Approximately 11kg