Whiteness meterIntroduction
Name: Whiteness Tester/Whiteness Tester Brief Description: Used to measure the blue light whiteness of object surfaces, with digital display of measurement results and built-in printer printing. It is easy to operate and has high accuracy. It is applicable to departments that need to measure the whiteness of products such as flour, starch, Rice noodles, salt, textiles, printing and dyeing, chemical fiber, plastic, porcelain clay, talc, white cement, paint, paint, ceramics, enamel, paper, pulp, etc.
　　Whiteness meterworking principle
The instrument uses an integrating sphere to measure spectral diffuse reflectance. The light emitted by a tungsten halogen lamp is converted into blue purple light through a condenser and a color filter, entering the integrating sphere. After diffuse reflection on the inner wall of the integrating sphere, the light is directed onto the sample at the testing port. The light reflected by the sample is received by a silicon photovoltaic cell after passing through a condenser and a light barrier filter group, and converted into an electrical signal. There is also a silicon photovoltaic cell that receives the substrate signal inside the sphere. The two electrical signals are amplified, mixed, and processed separately. The measurement results are displayed digitally and printed with a built-in printer. [1]
　　Whiteness meterProduct Features
1. Microcomputer, touch keyboard, LCD backlit display screen, standard serial RS232 data communication interface whiteness meter
2. Nonlinear data processing and data smoothing function, fast automatic multi-point correction, self diagnostic information prompt, fast and stable response, maintenance free and reliable operation. 3. The color measurement performance is extremely accurate. Using computer-aided design, the overall spectral characteristics of the instrument * conform to the CIE standard observer response curve, and can accurately obtain ISO whiteness. 4. By using a modified color filter system, the whiteness value WSB-2A after fluorescent whitening can be quantitatively reflected. With simple operation, the opacity of paper can be accurately measured. 5. High stability and reproducibility, eliminating system drift errors, equipped with data storage and query functions, can meet GLP requirements. 6. Equipped with imported original components, low loss switching power supply, reasonable and concise optical path design, and good reliability.
　　Whiteness meterpurpose
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 (R457) of the sample is called "blue brightness" or "ISO brightness". 2. Analyze whether the sample material contains fluorescent whitening agents and 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 green diffuse reflectance factor Ry. 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 meterTechnical Specifications
1. Diffuse illumination vertical detection method (d/o). This instrument complies with GB3978-83; Standard lighting fixtures and lighting observation conditions. Simulate D65 illumination body lighting. Using d/o illumination to observe geometric conditions, the diameter of the diffuser sphere is 150mm, the diameter of the test hole is 30mm, and a light absorber is installed to eliminate the influence of mirror reflection light on the sample. The peak wavelength of the spectral power distribution of the R457 whiteness optical system is 457nm, with a full width at half maximum of 44nm. The Y10 optical system complies with GB3979-83; Object color measurement method. 2. Measure and digitally display whiteness, fluorescence (whitening) whiteness, opacity (%), etc. 3. Zero drift: ≤ 0.14, indication drift: ≤ 0.15, indication error: ≤ 0.56, repeatability error: ≤ 0.17, mirror reflection error: ≤ 0.18, sample size: test plane not less than Φ 30mm, sample thickness not exceeding 40mm10, working environment: temperature 0-40 ℃, relative humidity not exceeding 85%