CATEGORIES

    Pencil Scratch Resistance Tester

    Overview Knowledge Standards Terms
    The pencil scratch tester moves a pencil with a fixed load across the surface of a sample to evaluate the scratch resistance of the coating based on pencil hardness grades. It is used for testing the surface hardness of coatings, plastics, and other materials, simulating everyday scratching scenarios.
    Selection
    When selecting, focus on the load range covering standard requirements, ensure fixtures securely hold the sample, and the pencil clamping structure guarantees stable scratching at a 45-degree angle. The instrument must include a hardness pencil set, and the weight of the pressure block should comply with standards such as ASTM D3363.

    Terms

    Pencil Hardness Tester

    Standards

    Active GB/T 4893.10-2024
    Test of surface coatings of furniture—Part 10: Determination of surface resistance to scratching
    Active GB/T 45973-2025
    Paints and varnishes—Scratch test using a spring-loaded pen
    Active GB/T 9279.2-2015
    Paints and varnishes—Determination of scratch resistance—Part 2: Variable-loading method
    Active GB/T 30707-2014
    Testing method on adhesion of fine ceramic coatings―Scratching
    Active GB/T 6739-2022
    Paints and varnishes—Determination of film hardness by pencil test
    Active GB/T 9279.1-2015
    Paints and varnishes—Determination of scratch resistance—Part 1: Constant-loading method
    Active GB/T 30786-2014
    Paints and varnishes―Guidelines for the introduction of scribe marks through coatings on metallic panels for corrosion testing

    Articles

    Pencil hardness tester rapidly evaluates scratch resistance of paint film.
    This article introduces how to quickly assess the scratch resistance of paint films using a pencil hardness tester. During the test, standard pencils (ranging from 6B to 9H) are used to scratch the coating at a fixed angle and pressure to observe whether scratches occur.
    Pencil Hardness Tester for Rapid Evaluation of Coating Surface Hardness
    The pencil hardness tester is a tool used for rapidly assessing the relative hardness of coating surfaces through standardized scratch tests. It employs a series of pencil leads with known hardness levels, which are drawn across the coating under a fixed load and angle. The hardness grade, ranging from 6B to 9H, is determined based on whether a permanent scratch is produced.
    Pencil Hardness Plan Outstanding Paint Film Pencil Hardness Grade
    The pencil hardness test is a method for evaluating the scratch resistance of paint films. It involves using a series of pencils with known hardness levels to scratch the coated surface under fixed conditions. The hardness grade of the coating is determined by observing whether permanent scratches are produced.
    Application of Film Pencil Hardness Tester in Coating Scratch Resistance Testing
    The paint film pencil hardness tester is an instrument used to evaluate the scratch resistance of coatings. It works by scratching the surface of the coating with a pencil of known hardness under a fixed load, and then assessing the hardness grade based on whether scratches are produced.
    Classification standards for determining the hardness of coatings using a pencil hardness tester.
    This article introduces the method of measuring the hardness of coatings using a pencil hardness tester. It involves using pencils of varying hardness to scratch the coating and observing whether scratches are produced to determine the hardness grade, ranging from 6B to 9H.
    Key Operational Points and Influencing Factors of Pencil Hardness Method for Determining Coating Film Hardness
    The pencil hardness test is a method used to evaluate the scratch resistance of a coating by making marks on the paint film with pencils of known hardness. During the operation, a uniformly cured sample is prepared, and calibrated pencils are used to make marks at a 45-degree angle with a fixed force, aiming to identify the highest hardness grade that does not scratch through the paint film.