Abstract:
Sign pen is a sort of writing tool
called marking pen. It is, together
with pencil, pen, ball point p-en, and
mechanical pencil, one of the most
widely used writing tool.
Using felt tip and oily, quick drying
ink, the marking pen was put on the
market in 1951 as a writing tool. This
felt tip pen was called felt marker.
The felt marker has a broad writing
tip and is used for writing on paper
as well as glass, wood, plastics, cloth,
metal, painted surface, and almost
any other sort of material. Moreover
the writing is water-resistant and will
not go out easily; therefore, it has
rapidly gained popularity as a convenient
marker.
