THe pencil

The pencil. An item the world takes for granted. But what was the world like before it? When I am done,you might think that stick is much more.

A pencil is a writing implement or art medium constructed of a narrow, solid pigment
core inside a protective casing which prevents the core from being broken or leaving
marks on the user’s hand during use.
Pencils create marks by physical abrasion, leaving behind a trail of solid core material
that adheres to a sheet of paper or other surface. They are distinct from pens, which
instead disperse a trail of liquid or gel ink that stains the light color of the paper.
Most pencil cores are made of graphite mixed with a clay binder which leaves grey or
black marks that can be easily erased. Graphite pencils are used for both writing and
drawing and result in durable markings: though writing is easily removable with an
eraser, it is otherwise resistant to moisture, most chemicals, ultraviolet radiation, and
natural aging. Other types of pencil core are less widely used, such as charcoal pencils,
which are mainly used by artists for drawing and sketching. Colored pencils are
sometimes used by teachers or editors to correct submitted texts, but are typically
regarded as art supplies, especially those with waxy core binders that tend to smear on
paper instead of erasing. Grease pencils have a softer, crayon-like waxy core that can
leave marks on smooth surfaces such as glass or porcelain.
The most common type of pencil casing is of thin wood, usually hexagonal in section
but sometimes cylindrical, permanently bonded to the core. Similar permanent casings
may be constructed of other materials such as plastic or paper.