On Mon, Apr 22, 2019 at 9:00 AM

*"I remember reading somewhere that more origami models are open back

*some design issue but I went back to my ODS book (which is where I think
Isaw that information) and couldn't find the explanation. So would anyone*
*please enlight me?"*

I'll venture to say that it's easier to bring folds together along a
central axis, which creates an open back when folded in half. The paper can
be folded to have a closed back, but this requires a bit more paper/spacing
delegated to the spine. Since the closed back models use precious paper
resource to make the continuous surface, adding additional flaps is
slightly more challenging because less paper is available.

At least in animal origami, where creatures typically have an axial
skeleton and appendicular features...



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