What rules are used in Pureland origami?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Red origami crane with outstretched wings and pointed beak, displayed against a solid black background. — origami An origami crane.

Pureland origami is a style of origami proposed by John Smith of England. It is defined by a specific composition system that adheres to the following rules:

Material: It must be folded using only square paper.
Technique: It utilizes only "mountain" and "valley" folds.

These constraints are designed to result in models that are straightforward and easy to duplicate.1