This illustration was created with watercolor and pen/ink on Canson XL Mix Media paper. This paper is some of the cruddiest stuff I've worked with. Canson says it's for acrylic, watercolor, pen and pencil, but it is horrible to work on with my media of choice. Ink lines fan out on the surface giving poor line quality, India ink drys lightly, and watercolors are difficult to lighten and adjust once on the paper.
Artists looking for a good paper beware of this brand. It will only frustrate. It's not worth the cheaper price.