Most commonly spray paint and markers. Many graffiti artists also use stencils. These are made by drawing an image onto a piece of cardboard or tougher versions of paper, then cut with a razor blade. What is left is then just simply sprayed-over, and if done correctly, a perfect image is left
See characteristics of common graffiti at http://en.wikipedia.org/wiki/Graffiti#Characteristics_of_common_graffiti
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A box of sidewalk chalk.
Most commonly spray paint and markers. Many graffiti artists also use stencils. These are made by drawing an image onto a piece of cardboard or tougher versions of paper, then cut with a razor blade. What is left is then just simply sprayed-over, and if done correctly, a perfect image is left
See characteristics of common graffiti at http://en.wikipedia.org/wiki/Graffiti#Characteristics_of_common_graffiti