A couple of months ago I played with hand-marbling paper using oil paints. The paper is still an experiment, but I’m fairly happy with how it turned out. The oil tended to create ripples in the paper, which limits the complexity of what I can fold. This model is a fairly simple design to try out my new paper. This piece is folded from one uncut rectangle of Strathmore pastel paper.
Here’s a tip that might help with marbled paper: I iron mine on a low setting, sandwiched between 2 pieces of light paper. The low heat doesn’t melt the design but helps to flatten the paper so it’s easier to work with.