One of the earliest and most important Hip Hop graffiti crews was the Savage Seven (later, as they increased in number, the Black Spades), who included future old school rap star Afrika Bambaataa. The Black Spades were followed by many other crews and graffiti art arose to mark boundaries between them, among other purposes. Hip Hop Graffiti as an art had been known since at least the 1950s, but began developing in earnest in 1969 and flourished during the 1970s. Originality was very important for graffiti artists; for example, in 1972, one well-respected graffiti artist called Super Kool replaced the dispersion cap on his spray paint with a wider one, found on a can of oven cleaner. This is still a common practice. By 1976, Hip Hop graffiti artists like Lee Quinones began painting whole murals using advanced techniques. Some of the most memorable of Quinones’ work was political in nature, calling for an end to the arms race, for example.This article is licensed under the GNU Free Documentation License. It uses material from the WikipediaHip HopHip Hop GraffitiHip Hop Clothing StoreHip Hop Music ProductionSite displaying hip hop graffitisite showing many hip hop graffiti works