To corrugate is to shape into undulating folds: parallel or alternating ridges and grooves. Corrugated cardboard is a common contemporary material in packaging, especially for boxes and cartons. It is usually made of three sheets of paper, the middle one is corrugated, and laminated between the other two layers. There are many types of corrugated cardboard, including colors, shapes and sizes of the undulations, and variations in the number of their layers per board. Cut corrugated cardboard with sturdy razors and light saws. Join pieces with any of many kinds of adhesives, staples, and tapes. Objects made with this material may not be very permanent, but they're easily and inexpensively produced! Packaging manufacturers as well as commercial users might even be coaxed into donating boards to students.Examples: Frank O. Gehry (American, born Canada, 1929-), designer, Easy Edges, c. 1972, side chair, corrugated cardboard, 33 x 14 1/2 x 23 inches, Minneapolis Institute of Arts.A detail of this chair's back reveals the textural qualities produced by the laminated sheets of corrugated cardboard of which Easy Edges is constructed. See architect, design, and furniture.