A mountain fold is just an upside down valley fold. One way to make it is to turn the paper over and make a valley fold: either horizontally, vertically, or diagonally, as appropriate.
To see a larger picture of each substep, just select the corresponding image.
|The mountain fold is indicated by a dash-dotted line. In this example, we will fold the left edge behind to the centerline. First, we turn the paper over from side-to-side, or book-fold, as appropriate.|
|We valley fold on the dashed line, which corresponds to the mountain-fold line on the other side.|
|In the middle of the valley fold...|
|Creasing the valley fold.|
|After completing the valley fold, we either turn the model back over, or undo the book-fold.|
|The finished mountain fold.|
Copyright 1995-96, 98-99 by John Paulsen. You can send him your comments.
Last updated July 23, 1999.