CATEGORIES

    Scratcher

    Overview Knowledge Standards Terms
    The scratch tester creates visible scratches on the surface of a material by moving a hard scratching needle under constant pressure. It is used to evaluate coating adhesion, surface hardness, and wear resistance, and is commonly employed in the testing of coatings, plastics, and metal platings.
    Selection
    When selecting, consider the compatibility of the stylus material and hardness with the test sample. The pressure range must cover the standard requirements, and the movement speed should be adjustable. Prioritize models with microscope reading functions to ensure measurement accuracy of scratch width. Ensure the equipment complies with standard specifications such as ASTM D3363 or ISO 1518.

    Terms

    Coating Scratch Tester
    Pencil Hardness Tester

    Standards

    Incoming GB/T 46732-2025
    Technical specification for lithium-ion batteries for household and similar electrical appliances
    Active GB/T 4937.30-2018
    Semiconductor devices—Mechanical and climatic test methods—Part 30: Preconditioning of non-hermetic surface mount devices prior to reliability testing
    Active GB/T 4937.22-2018
    Semiconductor devices—Mechanical and climatic test methods—Part 22: Bond strength
    Active GB/T 4937.21-2018
    Semiconductor devices—Mechanical and climatic test methods—Part 21: Solderability
    Active GB/T 4937.20-2018
    Semiconductor devices—Mechanical and climatic test methods—Part 20: Resistance of plastic encapsulated SMDs to the combined effect of moisture and soldering heat
    Active GB/T 4937.201-2018
    Semiconductor devices—Mechanical and climatic test methods—Part 20-1: Handling, packing, labelling and shipping of surface-mount devices sensitive to the combined effect of moisture and soldering heat
    Active GB/T 4937.19-2018
    Semiconductor devices—Mechanical and climatic test methods—Part 19: Die shear strength
    Active GB/T 4937.13-2018
    Semiconductor devices—Mechanical and climatic test methods—Part 13: Salt atmosphere
    Active GB/T 4937.12-2018
    Semiconductor devices—Mechanical and climatic test methods—Part 12: Vibration, variable frequency
    Active GB/T 4937.11-2018
    Semiconductor devices—Mechanical and climatic test methods—Part 11: Rapid change of temperature—Two-fluid-bath method
    Active GB/T 40359-2021
    Timekeeping instruments—Photoluminescent deposits—Test methods and requirements
    Active GB/T 41852-2022
    Semiconductor devices—Micro-electromechanical devices—Bend-and shear-type test methods of measuring adhesive strength for MEMS structures
    Active GB/T 42413-2023
    Glassware—Test method for freezing resistance of glass containers
    Active GB/T 4937.42-2023
    Semiconductor devices—Mechanical and climatic test methods—Part 42:Temperature and humidity storage
    Active GB/T 17344-2025
    Packaging—Packing containers—Air-tight test method

    Articles

    Circle Method Adhesion Tester for Evaluating the Adhesion of Paint Coatings by the Circular Rolling Line Method
    The rolling circle method is a technique for testing the adhesion of paint coatings using a circle-drawing instrument. The instrument employs a fixed-load stylus to draw a continuous circular trace on the coating at a constant speed, and the adhesion level is assessed based on the peeling condition of the scratch.
    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.
    Operation Specification for Circular Scratch Adhesion Tester
    The circle method adhesion tester is used to evaluate the adhesion strength between coatings and substrates. Before operation, it is necessary to inspect the instrument, prepare samples, and control the ambient temperature and humidity. During testing, the sample should be secured, appropriate load and scratch spacing should be selected, and the stylus should be moved at a constant speed to create a circular scratch.