## Colour change – part 1

Sometimes it is hard to believe that multi-coloured origami models are folded from a single piece of paper. For some people, "origami colour change" seems like magic. However, like anything else in origami, there is no magic whatsoever. Quite contrary, the complete colour-changing process is governed by strict and clearly defined rules. So, if you are interested in…

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## Perimeter theorem

The Perimeter theorem, even though being an unusual origami concept, is very intuitive and easily applicable. I believe that anybody interested in understanding origami should apprehend that exciting concept. I had never intended to write about the perimeter theorem until I wrote the blog post “Hatsune Miko and colour change”.  But since the very first question I got…

## Hatsune Miku and colour change

Hatsune Miku by Itagaki Yuichi is a fascinating model. Not only that, it accurately depicts the original Anime character, but it also implements a nice colour changing method that deserves a detailed explanation. Figure 1Figure 1 - Hatsune Miku and its baseFigure 1 The Crease pattern (figure 1) of this model is freely available on the Itagaki Yuichi…

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## Pythagorean stretch – advanced topic (no.1)

In this blog post, I will show you what could happen if we move a Pythagorean stretch element toward the non-square polygon.

## Printing paper and Origami

Is it possible to use printing paper in origami? The answer is plain and simple: YES, but with few limitations. First of all, printing paper is rather thick. On average, it is 80 g/m2. Even though much thicker origami paper can be found and used, Elephant Hide, for example, almost all types of origami paper are much thinner.On…

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## Dividing paper into thirds, fifths, sevenths, and so on …

Every box-pleated origami model is based on a grid. But not all grids are made equal. Some are easier to construct than others. For instance, grids like 2x2, 4x4, 8x8, 16x16, and so on are relatively simple to make, because they could be constructed by the consecutive halving of the paper.  This is possible because their size is…

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## Petal fold

Post is a part of a larger series (Folds): Valley and mountain fold Swivel fold Sink fold Petal fold Rabbit ear The petal fold belongs to the group of moderately complex folds. It is so because it cannot be described as a fold along a single line.  Nevertheless, it is regularly performed by absolute beginners. You see, the…

## Walking in the rain – analysis

Walking in the rain by Chen Xiao (Twitter. Flickr) is one of his most fascinating and, at the same time, one of his simplest models. Figure 1 - Waking in the rain by Chen Xiao I have to say that, for this model, only the crease pattern is available on the Internet. Unfortunately,  the available crease pattern is…

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## Level shifters

Post is a part of a larger series (Advanced concepts): Elias stretch Pythagorean stretch Pythagorean stretch - advance concept (no.1) Level shifters How to Collapse Box Pleated Crease Pattern? Anyone who has ever tried to design box pleated origami models knows that those models have rather narrow flaps. This feature doesn't have to be a problem, quite a…