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A carpenter pencil (carpentry pencil, carpenter's pencil) is a 
Carpenter pencils are sometimes used by artists and designers to draw a thick line easily when needed. Notching the middle of the lead with the corner of a
Carpenter's Pencil, by Doug Martin
{{DEFAULTSORT:Carpenter Pencil Pencils Woodworking hand tools Woodworking Carpentry
A carpenter pencil (carpentry pencil, carpenter's pencil) is a pencil
A pencil () is a writing or drawing implement with a solid pigment core in a protective casing that reduces the risk of core breakage, and keeps it from marking the user's hand.
Pencils create marks by physical abrasion, leaving a trail ...
that has a body with a rectangular or elliptical cross-section to prevent it from rolling away. Carpenter pencils are easier to grip than standard pencils, because they have a larger surface area. The non-round core allows thick or thin lines to be drawn by holding the pencil slightly rotated. Thin lines are required for high precision markings and are easy to erase, but thick markings are needed to mark on rough surfaces. The lead
Lead is a chemical element with the symbol Pb (from the Latin ) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point. When freshly cu ...
is strong to withstand the stress of marking on such surfaces. The pencil is robust to survive in a construction environment when carried together with heavy tools. The core is typically stronger than in other pencils. Carpenter pencils are used by builders because they can mark on surfaces like concrete
Concrete is a composite material composed of fine and coarse aggregate bonded together with a fluid cement (cement paste) that hardens (cures) over time. Concrete is the second-most-used substance in the world after water, and is the most wi ...
or stone
In geology, rock (or stone) is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its Chemical compound, chemical composition, and the way in which it is formed. Rocks ...
. This shape and lead density aid in marking legible lines with a straight edge that are clear and easy to follow with a saw blade. Carpenter pencils are typically manually sharpened with a knife, although special sharpeners can be used.
The flat pencil is one of the oldest pencil types. The first versions were made by hollowing out sticks of juniper wood. A superior technique was discovered: two wooden halves were carved with a groove running down them, a plumbago
''Plumbago'' is a genus of 10–20 species of flowering plants in the family Plumbaginaceae, native to warm temperate to tropical regions of the world. Common names include plumbago and leadwort (names which are also shared by the genus '' Cerat ...
stick placed in one of the grooves, and the two halves then glued together—essentially the same method in use to this day. Similar pencils (called 'jumbo pencils') are sometimes used by children. A pencil that is designed for a child rather than a carpenter would likely have a softer core, enabling the user to draw with less physical effort.
Carpenter pencils are sometimes used by artists and designers to draw a thick line easily when needed. Notching the middle of the lead with the corner of a file
File or filing may refer to:
Mechanical tools and processes
* File (tool), a tool used to ''remove'' fine amounts of material from a workpiece
**Filing (metalworking), a material removal process in manufacturing
** Nail file, a tool used to gent ...
makes it possible to draw two parallel lines at once, a technique used by artists and calligraphers.
References
External links
Carpenter's Pencil, by Doug Martin
{{DEFAULTSORT:Carpenter Pencil Pencils Woodworking hand tools Woodworking Carpentry