1003: Flat-folding Sine Wave-based Corrugation

Exploring the notion of curve-following corrugations, I drew a section of a sine wave, placed a series of graduated squares diagonally along it, constructed diagonal bisectors and extended them to the bounding boxes. then tiled, mirrored and flipped copies to construct a sine-wave that extended over an A4 page:

flat-folding sine wave-based corrugation - crease pattern

Although tiny, I used a stylus to score the necessary creases then spent a couple of hours delicately collapsing it.

flat-folding sine wave-based corrugation - finished form

The first few creases did not cooperate but as more of the structure emerged, it reinforced the remaining collapses and it sort of started to look after itself. Explore further the Maths behind this technique in this published paper.

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995: Broken

Playing with arguing pleats, I scored a sheet of card in random/odd verticals that were all a bit slanty, then accordioned it up to create the basic structure. Next I started creating a series of ziggy-zaggy inside reverse folds. in steps down, then steps back up.


The shadows of this thing really float my boat – I must explore if there is a way to control this some more – I am sure there is a method that allows me to create a path of fan-fold collapse that is curved.

I call this broken because this looks like a rip in space time (well, to me it does).

Entomologists Unite

In a meeting with other Brisbane Origami enthusiasts, we floated the idea of a Brisbane Origami Group (BORG).

media 9

Although in its infancy, eventually one of us will get organised enough to get a little more formal.

exhibition 1

In the interim, Vivian Sandoval (a practicing Entomologist and origamist) suggested we might be able to provide some models for a forthcoming conference.


The Perkins Memorial Dinner was held by The Entomological Society of Queensland on the 8th of October 2019 – decorated by displays from us 🙂

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