GB/T 43550.2-2023
ActiveMechanical pencils and leads for general use—Classification, dimensions, quality and test methods—Part 2: Black leads
一般用途活动铅笔和铅芯 分类、尺寸、质量和试验方法 第2部分：黑铅芯
Application Summary AI generated
This standard specifies the classification, dimensions, quality requirements, and test methods for black leads used in mechanical pencils for general consumer applications. It is applied by manufacturers and quality inspectors to ensure compatibility, break resistance, and consistent writing performance of 0.5 mm, 0.7 mm, and other common lead diameters. The standard is relevant for stationery production, retail quality control, and consumer safety testing in the general-use writing instrument market.
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Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.