Are you curious how I get this papertexture effect on the illustration? I've been working on this for a while, depending on what kind of illustration you import, it'll look like a papertexture or silkscreen-effect.
and you're in luck! I'm in a generous mood, so here's a free download for you! Just click here. The download will start automatically (PSD file). Just open it and place your artwork in the bottom layer. Not happy with the result? Play with the opacity and effects to get your own effect.