Technical Drawing and Sketching, ContinuedSharpeningyour sketchpencilsTo maintain uniform pencil width and pinpoint accuracy, you should sharpenyour pencil lead to a conical point.Standard office pencil sharpeners are finefor keeping the lead pointed. Also available are sharpeners that remove onlythe wooden encasement surrounding the graphite lead. These sharpenersrequire you to shape the lead by dragging the lead across a sandpaper padwhile rotating the pencil simultaneously between your thumb and forefinger.For detailed instructions on sharpening pencil leads, see DM, Volume I,chapter 1.Figure 4-4 shows how to point the pencil lead.Figure 4-4.—Sharpening a pencil.Continued on next page4-6
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