My friend Covadonga sent me a very nice step-by-step guide to making this origami envelope, originally attributed to Frances Levangia. She writes, “I made these diagrams based on paper models because otherwise I would forget how to make it, so when I like something, since I have no idea of how to diagram, I do it in this way”. Thanks Covadonga! 🙂
While searching for information on the envelope, I came across this site, where you will find a very nice collection of letterfolds and envelopes diagrammed by John Cunliffe. This same model is included among them; for those who are learning how to read diagrams, it could be interesting to compare it with Covadonga’s instructions to see how the drawings translate themselves into foldings.
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