This group of paintings are on rag paper or Yupo, a polypropylene surface first used in graphic design. In each case, the watercolor is applied over a pencil drawing but even though the process is the same, the results are vary different. With rag paper, the paint sinks into the paper whereas with the Yupo, the paint stays on the surface. With rag paper, you paint around areas to save the whites and with Yupo, you lift them off with a damp brush or rag. It's fascinating to see the results - same painter, same materials but a very different result.