CATEGORIES

    CrockMeter

    Overview Knowledge Standards Terms
    Color drawdown paper is used in the paint and ink industry to create a uniform color film on the paper surface using a blade, allowing comparison with standard color cards to evaluate color depth and coverage. The principle involves mechanically drawing a coating of controllable thickness, and its function is to quickly test pigment dispersibility and tinting strength. It is applied for on-site color difference control and formula adjustments in production.
    Selection
    When selecting color scraping paper, factors such as paper smoothness, ink absorption, and consistency in whiteness must be considered. There should be a clear boundary between the coated area and the comparison area, and paper thickness affects the scraping effect. Choose paper types with different surface treatments based on the viscosity of the test material, and verify adaptability to environmental temperature and humidity.
    function
    style
    size
    Surface film laminating

    Terms

    Paint Film Hiding Power Tester
    Pigment Grinding Machine
    Color development wheel
    Hiding power
    Coating film hiding power paper
    Black and white grid paper for paint
    Hiding power test panel
    Hiding power chart

    Standards

    Active GB/T 23981.2-2023
    Paints and varnishes—Determination of hiding power—Part 2:Method of black and white grid panel
    Active GB/T 23981.1-2019
    Paints and varnishes—Determination of hiding power—Part 1: Determination of contrast ratio of white and light coloured paints
    Active GB/T 13452.3-1992
    Paints and varnishes--Determination of hiding power--Part 1:Kubelka-Munk method for white and light coloured paints
    Active GB/T 5211.17-1988
    Comparison of contrast ratio(hiding power)of white pigments

    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.