Cardboard Shelter (a charity that raises money and awareness about homelessness). They can explain, what they do, better than I can, so, if you are interested, check out their website HERE. Plus, there's some lovely artwork to look at.
But, the gist of it is that a bunch of artists contribute a piece of work, to be sold at the exhibition. No themes and just one rule; the artwork must be on cardboard. 'The idea of the cardboard canvas is a nod towards the material which provides shelter to many homeless'. I pinched that quote from their site. See, I told you they could explain it better.
For this piece, I reworked one of the sketches I'd made at a Dr. Sketchy event, of the lovely Hell's Belle, on a piece of cardboard from an old, used, sketchbook (what else?). I knew that I kept those old pieces of cardboard for a reason.
Making this got me thinking; I hardly ever draw on coloured paper. I don't know why. I must do it more often. I like the effect and the tones I got from blending the graphite pencil into the grey board. But, don't hold your breath, I was saying something similar when I contributed to this good cause some time ago. Check THIS out.