Pulp Whiteness Tester

The pulp whiteness meter measures the intensity of diffuse reflected light from the sample surface under blue light irradiation and compares it with a standard whiteboard to calculate the whiteness value. It is used to detect the whiteness of pulp and paper, guiding bleaching processes and quality control.
Selection
When selecting, ensure the measurement range covers the sample whiteness range, and the calibration plate must have a traceability certificate. The integrating sphere structure ensures stable diffuse reflection measurement, automatic compensation functions reduce operational errors, and the instrument design is suitable for laboratory environments.

Terms

Standards

Instruments

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

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

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

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

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

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

R457 blue light whiteness formula, Measurement range 0~ 100%, resolution 0.1, Repeatability ≤ 0.3, suitable for fluorescent whitening objects and paper Opacity measurement.

$ 490.00

Using LED Illuminant, 45/0 illumination conditions, Measurement range 0~ 199.9, Repeatability ≤ 0.3, suitable for whiteness measurement of white objects or powders, easy to carry and on-site detection.

$ 393.00

Measurement time is only 1.5 seconds, Repeatability is less than R0.1, which can measure a variety of whiteness indicators and reflectance, and is suitable for the analysis of fluorescent whitening samples.

$ 800.00

Adopt LED Illuminant and 45/0 illumination conditions, measurement aperture Φ 15mm, resolution 0.1, Repeatability ≤ 0.3, AC-DC dual-use design is convenient for on-site rapid detection of whiteness value.

$ 233.00

Articles

Total Chlorine Content Microcoulometric Titration Detector for Pulp
This article introduces a method for detecting the total chlorine content in pulp using a microcoulometric titrator. The principle involves generating a titrant through electrolysis, which reacts with chloride ions produced from the combustion of the sample. The chlorine content is accurately calculated by monitoring the amount of electricity consumed.
Use of Muffle Furnace for Ash Determination in Pulp Inorganic Matter Testing
This article introduces the application of the ash determination muffle furnace in the detection of inorganic substances in pulp. The muffle furnace removes organic matter in the sample through high-temperature combustion, and the remaining inorganic residue, known as ash, is used to analyze the content of fillers and metal ions in the pulp.
Conductivity meter measures the conductivity of water extract from pulp.
This article introduces the method of measuring the electrical conductivity of pulp water extracts using a conductivity meter. Electrical conductivity reflects the content of soluble ions in pulp, which is used to evaluate washing effectiveness and the impact of water quality.
Determination of dry matter content in pulp using an electric thermostatic drying oven.
This article introduces the method for determining the dry matter content of pulp using an electric thermostatic drying oven. Dry matter content is a key indicator for evaluating pulp quality. The principle of determination involves evaporating the moisture in the pulp through heating and calculating the content based on the mass difference before and after drying.
The laboratory pulp wet disintegrator is used for pulp disintegration treatment.
The laboratory pulp wet disintegrator is a device used to simulate the industrial pulping process. It disperses pulp fibers into individual fibers or small fiber bundles through mechanical action, while simultaneously promoting fiber swelling and fibrillation, thereby providing standardized samples for subsequent performance evaluation.
Application of Dry Pulp Zero-Span Tensile Strength Tester
The dry pulp zero-span tensile strength tester is a device used to measure the intrinsic strength of pulp fibers. It directly determines the tensile properties of fibers by clamping and stretching them to the point of rupture at an extremely close distance, thereby avoiding the influence of fiber length and bonding forces.
Zero-span tensile strength tester measures the tensile strength of wet pulp.
This article introduces the method of measuring the tensile strength of wet pulp using a zero-span tensile strength tester. Traditional testing is often conducted after the pulp is dried, but testing in the wet state can more directly reflect the bonding potential between fibers.
Canadian Standard Freeness Tester for Measuring Pulp Drainage Performance
The Canadian Standard Freeness Tester is used to measure the drainage properties of pulp, which is an important indicator for evaluating pulp quality. Based on the principle of gravity filtration, the instrument measures the drainage rate of pulp suspension under standard conditions to determine the freeness value.
Application of Valley Beater in Pulp Laboratory Beating
The Valley beater is a device used in laboratories to simulate industrial beating processes. It modifies the morphology of pulp fibers through mechanical action, thereby influencing paper properties. During operation, parameters such as beating pressure, pulp consistency, and beating time must be controlled, with the beating degree serving as a quantitative measure of the effect.
Standard Method for Determining the Beating Degree of Pulp Using a PFI Mill
This article introduces the standard method for measuring the degree of pulp beating using a PFI mill. The beating degree is a key indicator of the extent of pulp fiber processing and directly affects paper quality.
Bauer-McNett Classifier Method and Fiber Fractionation Principle of Pulp Fiber Classifier
The Bauer-McNett classifier is a standard method that separates fibers by length and morphology through the sequential screening of pulp suspensions using sieves with different aperture sizes.
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.
Application of UV Spectrophotometer in the Determination of Lignin in Pulp
This article introduces the application of ultraviolet spectrophotometry in determining the lignin content in pulp. Lignin is a key component affecting pulp quality. This method utilizes the characteristic absorption of lignin under ultraviolet light for measurement, offering simple and rapid operation.
Determination of Chromaticity Value of Pulp by Spectrophotometry
This article introduces the method for determining pulp chromaticity using spectrophotometry. It first explains the importance of chromaticity for pulp quality, then details the basic principles of spectrophotometry, which quantifies color by measuring the reflection of light from the pulp, typically expressed using the CIELAB color system.
Application of Zero-Span Tensile Strength Tester in Pulp Strength Evaluation
The zero-span tensile strength tester measures the tensile strength of materials at an extremely short clamping distance, directly reflecting the inherent strength of the pulp fibers themselves, eliminating interference from factors such as fiber bonding.