Hangzhou Qingtong Boko YQ-Z-48B Whiteness Tester | Whiteness Meter

Hangzhou Qingtong Boko YQ-Z-48B Whiteness Tester | Whiteness meter is used to measure the whiteness of objects. It is widely used in the production and inspection departments of papermaking, textiles, printing and dyeing, plastics, ceramics, enamel, grain, building materials, paints, chemicals, salt, and other industries that require the determination of object whiteness. The instrument can also measure ISO Brightness (R457 whiteness), which can determine the fluorescence whitening produced by the emission of fluorescent substances in fluorescent whitening samples. It can also measure the transparency, opacity, light scattering coefficient, and absorption coefficient of paper and other thin sheet materials.

GB/T 3978： Standard lighting fixtures and geometric conditions;

GB/T 7973： Determination of diffuse reflectance coefficient of paper, cardboard and pulp（diffuse/Vertical method）；

GB/T 7974： Determination of brightness (whiteness) of paper, cardboard, and pulp（diffuse/Vertical method）；

ISO 2470： Blue diffuse reflectance factor of pulp, paper, and cardboard（ISObrightness）Measurement of;

GB/T 8940.2： Preparation of pulp brightness (whiteness) samples;

GB/T 2913： Plastic whiteness test method;

GB 12097： Method for determining starch whiteness;

GB/T 13025.2： General test methods for salt industryDetermination of whiteness;

FZ/T 50010.7： Pulp for viscose fibersDetermination of whiteness;

GB/T 5950： Measurement method for whiteness of building materials and non-metallic mineral products;

GB/T 9338： fluorescent whitening agentDetermination of relative whitenessInstrument method;

ISO 2471； Paper and cardboard opacity（Paper backing）Measurement of diffuse reflectance method;

GB/T 1543： Determination of opacity of paper and paperboard (paper backing) using diffuse reflectance method;

GB/T 10339： Determination of light scattering and absorption coefficients of paper, cardboard, and pulp;

GB 9087： Powder standard whiteboard for chromaticity and photometry measurement;

III Specifications and main technical parameters

1.Zero drift: ≤0.1﹪；

2Indication drift: ≤0.1﹪；

3.Indication error: ≤0.5﹪；

4.Repetitive error:≤0.1﹪；

5Mirror reflection error:≤0.1﹪；

6、Sample size: Test plane ≥ ￠30mm,Thickness ≤40mm；

7Power supply:220V±10%，50Hz；

8Working environment: Temperature0～40℃The relative humidity should not exceed 85%;

9External dimensions (length x width x height),mm：365×260×4259；

10Instrument quality: approximately11kg.

1ISO Brightness (R457 whiteness) can be measured, and for fluorescent whitening samples, the fluorescence whitening produced by the emission of fluorescent substances can also be determined.

2Measure the brightness stimulus value Y10;

3Measure opacity;

4Measure transparency;

5Measure the light scattering coefficient and absorption coefficient;

6Can measure multiple times and provide the arithmetic mean of a series of measurement results;

7Equipped with power-off protection, zero adjustment, calibration, and standard measurement data, even in the event of power loss, the data is protected from loss.

HY-1Constant pressure sampler.