In particular the use of the bold style lettering is really distinctive to graffiti art. The images themselves will usually be hard hitting, and be painted in stark colors utilizing strong shadows and outlines to add depth and definition. Images usually depict social or political issues close to the artist's heart.
Before you start a piece of graffiti art, you should draw a small scale version of the large piece you want to create first, then when you begin your actual piece, its a simple task of just scaling up your graffiti sketch.
If you need ideas for a graffiti font to use, there are plenty of sites online that have examples for you to copy. For the outlines, use a fine marker pen. In order to produce a 3D effect, shade around the letters you've outlined with a different color. Then use permanent markers to color in your letters.
Once you are ready to paint your sketch on to your larger canvas or wall, you need to draw a reference grid over your small drawing. Sketch a full size replica of the grid on to your wall or canvas that you are using for your scaled up graffiti piece. Use either chalk, charcoal or diluted paint to draw the large grid. To make marking the grid out easier, the simplest thing to do is to use a piece of string.
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