This fourth esquisse required us to create a hollow cube using Xanita Board.
The dimension is 60x60x60mm and the cube has to consist of 3 types of corners and a locking system. Firstly, one of the corners used in this cube is formed by having a rectangular depression all the way to the bottom on the inner surface so that it can be easily folded in an angle of 90 degree. Secondly, an isosceles triangular cut is made on the inner surface so as to create a perfect 90 degree corner when folded. Last but not least, a stripped thin layer of the board is peeled away to allow the corner to be bent, creating a curve on the outer surface.
For the locking system, this cube uses a dovetail joint for a stronger hold.