Blog Post Image: Origins and uses of wrinkles, creases, folds

Three ruga states and how they form A phase diagram shows the amount of compressive strain needed to create wrinkles, creases and folds in rubbery materials. The purple area denotes the wrinkle state and the aqua areas are two crease states. The spot marked “R” denotes folding. Image credit: Kim lab/Brown University (Click image to enlarge)