A landmark global event, The Exchange started in 2005 when six US graffiti artists came together to exchange ideas and sketches with other writers. Today there are 33 international members. The participants pair up, trading names, styles and outlines to create a sketch, which they then scan and email to their partner to recreate and execute. This procedure is repeated so that all artists have the opportunity to exchange artwork with the whole group. As they rise to the challenge of working outside their comfort zone, their individual style progresses and grows.