These are all paper:
As a student, Shioyasu was fascinated by the veins in the leaves of Rumex japonicus found all over campus. The veins were so delicate, yet had such dynamic forms, and she once tried cutting them out one by one with a utility knife. She describes this as the inspiration behind her current works, created on the theme of “nature,” and falling into three categories: cutting works, which she creates with fine, overlapping cuts in large, wide sheets of paper using utility knives, soldering-iron works, in which she creates images by melting holes in special synthetic paper, and drawings, using acrylics or charcoal. Common to each of these approaches is a significant amount of delicate and repetitive work performed by hand.
From SCAI the Bathhouse