Spectrophotometric White Index Meter

The spectrophotometric whiteness meter measures the whiteness value by irradiating the sample with a light source of specific wavelengths and detecting the intensity of the reflected light. It is used for whiteness testing of materials such as paper and plastics, ensuring color consistency across production batches.
Selection
When selecting, consider matching the measurement aperture to the sample size, support industry-standard whiteness formulas, and ensure the instrument is regularly calibrated. Review the instrument's repeatability data, ensure the operation interface aligns with user habits, and confirm suitability for laboratory or workshop environments.

Terms

Standards

Instruments

Using Spectrophotometric method, spectra-trophotometry detection, the minimum display value is 0.001mg/L, the imported cold light source life is 100,000 hours, supports a variety of Measurement modes and wireless transmission, intelligent operation and low cost of consumables.

$ 816.00

White part reflectance 80 +/- 2, non-Laminating design to enhance paint wettability, test area of 0.1 square Meters, Curl and checking resistance, suitable for brushing applications.

$ 88.00

Laminating-free black and white half design, size 98 * 152mm, Encasement specification 100 sheets/bag, suitable for Coating inks film hiding power performance detection experiment.

$ 89.00

Black part reflectance less than 1, white part reflectance 80 +/- 2, Laminating design enhanced anti-Curl ability, suitable for spreading rate testing, area of 0.1 square Meters.

$ 89.00

Made of non-fluorescent paper, does not contain Fluorescent Whitening Agent, the black part reflectance is less than 1, the white part reflectance is 80 +/- 2, the surface is smooth and anti-Curl, and the test area is 0.1 square Meters.

$ 91.00

Using Spectrophotometric method, spectra-trophotometry to detect nickel concentration, detection limit of 0.1mg/L, equipped with imported cold light source life of 100,000 hours, support a variety of Measurement mode and wireless data transmission function.

$ 816.00

Measurement accuracy of refractive index is +/- 0.0002nD, Measurement range is 3000-1.7000 nD, base is made of stainless steel, prism is made of hard Glass.

$ 420.00

After overheating, the white display window shows white characters on a black background, and the frame adopts regression directional reflection technology to facilitate low-light long-distance inspection. The size is 25 * 25mm, and the discoloration method is irreversible, which is suitable for indoor and outdoor environments.

$ 90.00

Based on o-phenanthroline Spectrophotometric method, spec-trophotometry, the detection limit is up to 0.01mg/L, the imported cold light source does not need to be preheated, and supports continuous Measurement mode. Colorimetric integrated tube operation is safe and fast.

$ 816.00

Black part reflectance less than 1, white part reflectance 80 +/- 2, no Laminating design to enhance paint wettability, avoid checking or cissing, suitable for specific spreading rate brushing tests.

$ 88.00

Temperature sensitive discoloration paint after overheating Color from white to transparent, irreversible discoloration, suitable for rough oil surface, Measuring temperature 60 ℃, Net weight of plastic bottles 100 grams.

$ 131.00

Adopt 165 ℃ thermostatic digestion and spectrophotometric detection technology, detection range 0~ 20000mg/L, support digestion Colorimetric integrated tube design, built-in rechargeable battery, can store 4000 sets of data and support a variety of transmission interfaces.

$ 2526.00

Using non-fluorescent paper substrate, white reflectance 80 +/- 2, black reflectance < 1, Laminating design enhances Curl resistance, 0.1 square Meter standard area is suitable for spreading rate testing.

$ 91.00

Measurement refractive index range 3000-1.7000, accuracy of +/- 0.0002, can be connected to Thermostat determination of 0 ℃ -70 ℃ refractive index, support sugar concentration 0-95% measurement, resolution 0.0005, suitable for Optical Property Analysis of various substances.

$ 428.00

Using irreversible discoloration technology, white turns black after overheating, temperature Measurement accuracy 100 ℃, Dimensions 22 * 22mm, each piece is a single temperature point.

$ 101.00

Articles

Use of Fluorescence Spectrophotometer in Measuring Excitation and Emission Spectra of Anti-Counterfeiting Fluorescent Inks
This article introduces the application of fluorescence spectrophotometry in the spectral measurement of anti-counterfeiting fluorescent inks, including instrument calibration, sample preparation, and methods for measuring excitation and emission spectra.
Spectrophotometer measures ink spectral reflectance and opacity.
This article introduces how to measure the hiding power of ink using a spectrophotometer. The instrument irradiates the ink sample, measures its reflectance within the visible light spectrum, and calculates the hiding power using the Kubelka-Munk model.
The combination of hiding power chart paper and a spectrophotometer enables the digital evaluation of hiding power.
This article introduces how to combine hiding power cards with spectrophotometers to achieve digital assessment of hiding power.
UV spectrophotometer for measuring residual monomers in polymer solutions.
This article introduces a method for determining residual monomers in polymer solutions using ultraviolet spectrophotometry. The principle relies on the characteristic absorption of monomers in the ultraviolet region, calculating their content based on the relationship between absorbance and concentration.
UV-Vis-NIR spectrophotometer measures the transmittance of anti-reflection coatings.
This article introduces the method of measuring the transmittance of anti-reflective coatings using a UV-Vis-NIR spectrophotometer. The instrument is based on the Beer-Lambert law, calculating transmittance by comparing the light intensity of the sample and the reference, covering a wide spectral range from ultraviolet to near-infrared.
Determination of Transmittance of Resin Solutions Using UV-Visible Spectrophotometer
This article introduces the method of measuring the transmittance of resin solutions using a UV-Vis spectrophotometer.
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.
UV-Vis Spectrophotometer Measures Ink Pigment Concentration
This article introduces the method of measuring the concentration of ink pigments using a UV-Vis spectrophotometer. The principle is based on the Lambert-Beer law, which calculates the concentration by measuring the absorbance of the pigment solution at specific wavelengths.
The role of spectrophotometers in ink color matching
The spectrophotometer objectively quantifies color by measuring the spectral data of ink. Based on the Lambert-Beer law, it converts color into calculable spectral values, replacing traditional methods that rely on the human eye and experience.
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.
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.
Difference between dual-beam and array spectrophotometers
This article aims to systematically elucidate the core differences between double-beam and array-type spectrophotometers in terms of working principles, optical structures, performance characteristics, and applicable scenarios, providing clear technical references for professionals in related fields.
Spectrophotometric Determination of Sulfur Content by Ultraviolet Fluorescence Method
The determination of sulfur content by ultraviolet fluorescence spectrophotometry involves burning the sample to convert sulfur into sulfur dioxide, which is then excited by ultraviolet light to produce fluorescence for detection.