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  1. Copilot Answer

    Graphite Grading Scale Explained | Pencils.com

    • Learn how to choose the right pencil for your needs based on the hardness of the graphite core. Compare the numerical and HB graphite scales and see how they differ across brands and regions.… See more

    Numerical Graphite Scale

    The first graphite grading scale is a numeric scale. Using this scale, the hardness of the core is often marked on the pencil — look for a number (such as “2” “2-1/2” or “3”). The higher the number the harder the writing cor… See more

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