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Tuesday, 11 August 2015 23:31

Torsion Fold


by  Gerardo
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There are two very common type of folds that make models 3D, yet they have never been named. I propose in this short article a name for one of them and an explanation of the fold.

Torsion fold: You can make this fold when you have a series of rectangular creases or walls forming a prism. Each rectangle is divided by a diagonal valley crease that starts and ends between the same corners. The rectangles are folded down and twisted following the diagonal creases.

If the twist fold is for high intermediate folding skills then the torsion fold is for mid intermediate skills; it’s easier to fold. It shouldn't be confused with the “3D twist fold” like in Kawasaki’s roses, as mentioned in his book Roses, Origami and Math or with the “iris closure”, named by Philip-Chapman Bell as it resembles the iris of a camera, like in his 8-sided Compass Rose Jar. It also isn’t the same as a “coil fold”, explained in Tomoko Fuse’s Spiral: Origami ? Art ? Design, although the simplest coil folds are actually made out of continues torsion folds.

Examples of the torsion fold can be found in Twist Box by David Martínez, Spring into Action by Jeff Beynon, and Triple Spiral Cube by Jun Maekawa. This last two are in fact coil folds.

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