DRAWING PENCILS
Pencils are relatively inexpensive, quite versatile, and uniquely responsive to
pressure while drawing.
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Leod Holders
• Lead holders employ standard 2 mm leads.
• The push-button action of a clutch mechanism allows the exposed length
of the lead shaft to be adjusted or withdrawn when the pencil is not in use.
• The lead point, which is capable of a variety of line w
eights, must be kept
well sharpened with alead pointer.
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Mech
anical Pencils
• Mechanical pencils utilize 0.3 mm, 0.5 mm, 0.7 mm, and 0.9 mm leads.
• A push-button mechanism advances the lead automatically through a
metal sleeve. This sleeve should be long enough to clear the edges of
drafting triangles and straightedges.
• The relatively thin leads of mechanical pencils do not require sharpening.
• 0.3 mm pencils yield very fine lines, but the thin leads are susceptible to
breaking if applied with too much pressure.
• 0.5 mm pencils are the most practical for general drawing purposes.
• 0.7 mm and 0.9 mm pencils are useful for sketching and writing; avoid
using these pencils to produce heavy line weights.
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Wood-Encased Pencils
• Wooden drawing pencils are typically used for freehand drawing and sketching.
If used for drafting, the wood must be shaved back to expose 3/4" of the lead
shaft so that it can be sharpened with sandpaper or alead pointer.
All three styles of pencils are capable of producing quality line drawings. As you
try each type out, you w gradually develop a preference for the characteristic
ill
feel, weight, and balance of a particular instrument as you draw.
2 /ARCHITECTURAl GRAPH! CS