I use the solvent transfer method because it's clean, easy and fast. First I write the caption, then find the appropriate source material online. I print it out and hand trace it in black pen. I scan it in and Photoshop it together with a caption. I print it in reverse on a photocopier then rub eucalyptus oil on the back of it while face down on the canvas or paper. The friction 'melts' the binding agents of the copy and the oil bridges the carbon from the copy onto the canvas. Voila!