Opacity paper

Masking paper is a specialized test paper that uses its opaque coating to cover underlying patterns or color blocks, designed for evaluating the hiding power of coatings and inks. The principle involves utilizing a highly opaque white coating on the paper substrate to block light transmission, making the covering effect of the top coating visible. Its function is to enable rapid comparison of the hiding performance of different formulations in laboratory settings, applied in areas such as coating opacity testing and printing ink hiding power inspection.
Selection
When selecting hiding power paper, consider the smoothness of the base paper and uniformity of thickness, ensuring stable and consistent whiteness of the coating. Match the type of material being tested, such as using high-whiteness grades for dark-colored coatings. Pay attention to the paper's resistance to penetration to avoid leakage of test liquids affecting judgment. Refer to industry standard specifications to ensure comparability of test results. Choose the appropriate size based on the commonly used test volume.

Terms

Standards

Instruments

Using blue light diffuse reflection factor R457 measurement technology, Precision ≤ 0.5%, can simultaneously analyze the content of Fluorescent Whitening Agent and determine Opacity, transparency and other Optical inspection paraMeters, support thermal printing output.

$ 1259.00

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 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 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

Pure white paper surface sealed, size 194x286mm, ASTM standard, support hiding power measurement and levelling sag test, matching Applicator Rod can obtain uniform coating results.

$ 307.00

Using film lamination technology, with excellent solvent and chemical resistance, paper Film thickness 0.29mm, surface Laminating to ensure Spreader uniformity, with annotation section for easy recording of test data.

$ 306.00

Vacuum principle measurement paper breathability performance, Measurement range 0-1000ml/min, test area of 10cm ², suitable for a variety of industrial paper mass detection.

$ 1134.00

Black and white half design is convenient for hiding ratio calculation, surface sealing treatment improves waterproof performance, 200x125mm specification ensures test standardization, and effectively prevents paper Curl from affecting Measurement accuracy.

$ 162.00

Black and white half design, size 98x152mm, with anti-permeability and Color uniformity, smooth surface is not easy to Curl, suitable for accurate hiding power measurement and levelling sag detection.

$ 267.00

The sampling size of the equipment is 300 * 320mm, and the parallelism of the incision is less than or equal to 0.1mm. It can accurately detect the mechanical properties such as paper tension resistance, elongation and fracture length, and meets the requirements of many national standards.

$ 211.00

Made of high-quality non-fluorescent paper, does not contain Fluorescent Whitening Agent, black reflectance < 1, white reflectance 80 +/- 2, Laminating design enhances anti-Curl ability, test area of 0.1 square Meters.

$ 89.00

Measurement range 10~ 500mN, resolution 5mN, tear arm 104mm, paper size 25 * 15mm, suitable for accurate determination of paper Tear strength.

$ 782.00

Using sealed surface preparation, excellent waterproof and anti-Curling performance, specification 200x125mm, black and white checkerboard design is convenient for fast measurement of hiding power values within 1 second.

$ 162.00

Using the Cobb test method, the test area is 100cm ² +/- 0.2, and the pressure roller mass is 10kg +/- 0.5, which is suitable for the detection of Water Absorbency on the surface of sizing paper and Cardboard, and is not suitable for loose or unsizing paper.

$ 848.00

Measurement range 0-20mm, accuracy 0.001mm, contact pressure 20 +/- 5kPa, suitable for paper, Cardboard and sheet material Film thickness detection, in line with a number of international standards.

$ 401.00

Articles

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.
Technical Details of Measuring Paint Contrast Ratio Using Black-and-White Checkerboard Method with Hiding Power Card
This article introduces a method for measuring the hiding power of coatings using black and white checkerboard paper.
Reflectometer for measuring the hiding power of colored paint coatings
This article introduces the method of using a reflectometer to measure the hiding power of colored paint coatings. Hiding power refers to the ability of a coating to conceal differences in the underlying color. Traditional methods relying on visual judgment are prone to subjective influences, while instrumental measurement offers greater objectivity and accuracy.
Opacity tester evaluates the covering power of coatings.
The hiding power tester is a professional instrument used to evaluate the covering ability of coatings. It quantifies the hiding effect by measuring the reflectance ratio (contrast ratio) of the coating film on black and white substrates.
Black-and-white checkerboard and reflectometer for measuring pigment hiding power
This article introduces two methods for measuring the hiding power of pigments: the black-and-white checkerboard method and the reflectometer method.
Covering Power Evaluation—Mass per Unit Area Method vs. Reflectance Comparison Method
This article primarily discusses two common methods for evaluating hiding power in industries such as coatings and inks: the mass per unit area method and the reflectance contrast method.
The role of black-and-white test paper in contrast ratio measurement
Black-and-white test paper plays a key role in determining the contrast ratio of coating materials. The contrast ratio is an important indicator of hiding power, calculated by comparing the reflectance of the coating on black and white substrates.
Hiding power measurement: Equivalence of mass per unit area method and reflectance contrast method.
Covering power is a key indicator for evaluating the optical performance of coating materials such as paints, inks, and pigments, reflecting the material's ability to conceal the color of the substrate. Accurate determination of covering power is crucial in industrial quality control and research and development.