Street Graffiti

Modern graffiti art often incorporates additional arts and technologies. For example, Graffiti Research Lab has encouraged the use of projected images and magnetic light-emitting diodes as new media for graffiti writers. The Italian artist Kaso is pursuing regenerative graffiti through experimentation with abstract shapes and deliberate modification of previous graffiti artworks. Yarnbombing is another recent form of graffiti. Yarnbombers occasionally target previous graffiti for modification.
Characteristics of common graffiti
Some of the most common styles of graffiti have their own names. A "tag" is the most basic writing of an artist's name, it is simply a handstyle. A graffiti writer's tag is his or her personalized signature. Tagging is often the example given when opponents of graffiti refer to any acts of handstyle graffiti writing (it is by far the most common form of graffiti). Tags can contain subtle and sometimes cryptic messages, and might incorporate the artist's crew initials or other letters. One form of tagging known as "pissing" is the act of taking a refillable fire extinguisher and replacing the contents inside with paint, allowing for tags as high as around 20 feet. Aiming and keeping a handstyle steady in this form of tagging is very difficult, usually coming out wavy and sloppy.