Collage is first step on for these faces on watercolor paper. Cheap paper but sturdy enough. I had already sketched faces in the Canson XL pad, 9 x 12. ( got a good deal on Amazon. 30 sheets for under 6 dollars.) Most of the background papers are tissue so thet glue on quickly and securely. That lime green was from a post it note pad on my work table. I like the pop of color. We will see how they look once I paint over this.