I've been experimenting with 'photo transfers' a fair bit recently. I was impressed by results seen on youTube (e.g. photo transfer to wood) and decided to give it a go myself.
The principle is actually quite simple: you transfer the toner particles from a regular printout with matt medium (acrylic paint) onto the surface of your preferred medium.
I chose plywood and acrylics/matt medium since I have heaps of that stuff around for my stencil works anyways. here's what I did in more detail:
1.) choose your digital image and mirror it (flip horizontal)
2.) print with laser printer or photo copy that uses toner (ink does not work!) on regular printer paper
3.) prep your canvas (2 layers of acrylics will do) and sand it to smoothen surface
4.) apply even layer of matt medium across your canvas and press paper printout onto canvas surface. be quick and flatten printout from the middle to the outside using your hands/brush/spatula to remove airbubbles
5.) let canvas and paper dry (overnight is good!)
6.) sprinkle water on paper, let it soak for a bit and carefully start rubbing of the paper
7.) you'll have to repeat step 6 for a few times until most of the fibres are removed
8.) i then touch up the transferred image with my airbrush and add texture like drops and sprinkles to it...
there you go, guys!! quite simple and there's heaps of info/tips/tutorials out there on the net if you decide to try for yourself...it's no magic but requires some practice to fine-tune amounts of paint and not rubbing off the transferred image!