Simple compound folds require simultaneous valley and mountain folds but the creases can be made before the actual folding. Line up the pinch marks with the edges of the paper.Pull the bottom of flap to be folded behind itself, but without trapping other layers of paper between them (this is only a problem if there are flaps behind the section to be folded, and can be avoided if the flaps are pulled apart a bit to open them and give you more space to fold).Lightly pinch the paper along where the crease will be. Therefore, to complete a mountain fold, these instructions must be followed: This can present problems with the folding order, as valley folds are occasionally performed when there are other layers of paper underneath and the paper cannot merely be turned over. Mountain fold Mountain foldĪ mountain fold is much the same as a valley fold, except in one respect: it is in the opposite direction. The crease should be exactly where you intended it to be, without any waviness in the edge, without any "bubbles" in the layers of paper, and without any slipping of the paper at the edge(s) or corner(s). Without letting up on the paper, continue the spreading motion until the crease is sharp. While holding the paper down so it does not slip, spread your thumb(s) far enough from the edge that they reach the intended crease line. Gradually move your thumb(s) away from your finger(s), pushing your thumb into the paper, but pulling the paper taut between your thumb(s) and your fingers. Also hold down the paper with one (or both) thumbs. This is often done by holding the paper down at two edges with your index fingers. While holding the paper down so it does not slip, spread out a flat area on the paper.Hold (a loosely folded, uncreased) paper down to prevent slipping.Line up a corner (by lining up the edges on one side, and lining up the edges on the other side).Here is one way to make the valley fold very precisely: These steps help fold the paper very precisely, which is important in complicated models. The valley fold - which most people do as "just fold the paper in half" - is really made of substeps. Basic skills Valley fold Valley foldĪ valley fold is the first basic fold, in which the paper is folded in front of itself.
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