Powder Whiteness Determination Apparatus

The powder whiteness tester simulates D65 light source to illuminate the sample, measures the blue wavelength reflected from the object's surface in comparison with a standard whiteboard, and calculates the whiteness value. It is used to assess the whiteness quality of materials such as titanium dioxide and kaolin, ensuring product appearance consistency in industries like coatings and papermaking.
Selection
When selecting, focus on matching the measurement aperture to the sample size, and ensure the calibration whiteboard comes with a traceability certificate. Choose the sample press type based on powder flowability, and verify that the instrument's repeatability error is less than 0.2. The working environment should be free from vibration and direct light. Ceramic standard boards are more wear-resistant than plastic ones.

Terms

Standards

Instruments

Can measure ISO whiteness and fluorescence whiteness, Repeatability ≤ 0.02, support data cache and power-off protection, equipped with RS232 interface for easy communication, suitable for powder and flake samples.

$ 953.00

Can measure ISO blue light whiteness and fluorescence whiteness, support powder whiteness measurement, Repeatability ≤ 0.02, built-in thermal printer, data can be cached and power-off protection, equipped with RS232 interface for easy communication.

$ 1051.00

Fully automatic one-click measurement of a variety of whiteness paraMeters, support chromaticity coordinates ≤ 0.001 High Accuracy, built-in thermal printer and RS232 interface, suitable for powder, paper and other samples.

$ 1818.00

Using R457 whiteness formula, blue light whiteness and fluorescence whiteness can be measured simultaneously, Repeatability ≤ 0.3, Operating temperature 5~ 35 ℃, optical path design is simple to ensure measurement accuracy and Repeatability.

$ 432.00

Repeatability of 0.2 for measurement of diffuse reflection factor using 457 nm blue wavelength can detect Fluorescent Whitening Agent and calculate fluorescence whiteness value, which is suitable for surface whiteness analysis of various materials.

$ 554.00

Can measure ISO whiteness and fluorescence whiteness, equipped with diffuse ball diaMeter 150mm, test hole 19mm, support light scattering coefficient, absorption coefficient and other Optical inspection paraMeters, suitable for a variety of material surface whiteness analysis.

$ 1174.00

R457 blue light whiteness formula, Measurement range 0~ 199.9%, resolution 0.1, Basis Weight measurement of whiteness of fluorescent whitening objects and paper Opacity, suitable for a variety of materials surface flat samples.

$ 332.00

Using LED Illuminant and 45/0 illumination conditions, Measurement range 0~ 199.9, resolution 0.1, can detect Fluorescent Whitening Agent and measure increased whiteness, Repeatability ≤ 0.3.

$ 417.00

Using blue light whiteness R457 standard, Measurement range 0~ 100, Repeatability ≤ 0.5, Basis Weight can reflect fluorescent whitening effect and accurate measurement paper Opacity.

$ 654.00

Constant pressure ensures uniform sampling, suitable for a variety of powder material testing, implementation of GB9087-88 and other standards, improve sampling accuracy and conformity.

$ 222.00

It can measure the blue light diffuse reflection factor (R457) and fluorescence whiteness, use d/o illumination observation geometry conditions, test hole diaMeter 30mm, can analyze whether the material contains fluorescent whitening agent and measure a variety of Optical inspection coefficients.

$ 1348.00

R457 blue light whiteness measurement, Indication Error +/- 2.5, repeatability error ≤ 0.3, equipped with 10V/30W halogen tungsten lamp light source to ensure stable reflection performance detection.

$ 687.00

Special design container to ensure measurement conformity, suitable for color scheme, suitable for fine powder particle measurement, effectively avoid the influence of powder tightness and surface Smoothness.

$ 220.00

Geometry conditions were observed using d/o illumination, and the diaMeter of the diffuse sphere was 150mm, which can measure the diffuse reflection factor of blue light and the fluorescence whiteness, and support Multi-ParaMeter analysis such as Opacity and light scattering coefficient.

$ 1300.00

Using fixed funnel method to measure powder flowability, equipped with 10mm inner through Glass funnel and 0-100mm scale struts, can accurately measure cone height, meet the requirements of Pharmacopoeia and ISO standards.

$ 535.00

Articles

Paper Whiteness Tester Measures CIE Whiteness
This article explains how a paper whiteness meter measures CIE whiteness. Whiteness is a crucial optical indicator for evaluating paper quality. Traditional methods rely on subjective judgment, while modern instruments provide objective data by simulating standard lighting conditions.
Principle and Application of Whiteness Meter in Measuring Coating Whiteness
A whiteness meter quantifies the whiteness of paint samples by simulating human perception of white, measuring the diffuse reflectance of light—particularly in the blue wavelength range—and converting it into a numerical whiteness value. It employs standardized optical configurations and mathematical models, such as the Ganz formula, to assess the brightness and chromaticity of coatings.
Calibration and Use of Paper Whiteness Tester
This article introduces the working principle, calibration process, operational steps, and factors influencing the measurement results of a paper whiteness tester. The instrument evaluates whiteness by measuring the reflectance of blue light from paper, and calibration requires the use of a standard whiteboard in accordance with relevant standards.
Application of Whiteness Meter in the Evaluation of Paper Brightness and Visual Comfort
The whiteness meter quantifies the brightness and whiteness of paper by measuring its reflected light characteristics, following international standards such as ISO to ensure comparability of results. The brightness of paper affects visual comfort, and moderate whiteness can enhance the reading experience, but excessive whiteness may lead to fatigue.
Whiteness meter measures the whiteness of white pigments
This article introduces the standard method for measuring the whiteness of white pigments using a whiteness meter. Whiteness is an important optical indicator for evaluating the quality of white pigments, and a whiteness meter can provide objective measurements.
The Key Role of Apparent Density Meters in Assessing Powder Flowability.
This article discusses how a bulk density tester is used to evaluate the flowability of powders. Powder flowability is crucial in production. The instrument measures the bulk density and tapped density, then calculates the compressibility index and Hausner ratio. These two parameters directly reflect the quality of powder flow.
The combination of bulk density tester and angle of repose tester provides a one-stop solution for powder flowability testing.
This article introduces a method for comprehensively evaluating powder flowability in powder engineering by combining the use of an apparent density tester and an angle of repose tester. Apparent density reflects the packing characteristics of the powder, while the angle of repose indicates its ease of flow.