How to make an origami butterfly based on open sink-fold

(page 4)

5th picture of origami butterfly

05.

Apply "open sink-fold" according to the step #4.

If you don't know what "open sink-fold" , study the above link to learn this important folding tecnique.

6th picture of origami butterfly

06.

This is what you get after applying "open sink-fold" .

Let us turn the model over.