How to make an easy origami book (page 7)

 

11. Shrink the origami book model following the arrow directions of the step #10.   Prepare to continue shrinking the origami book model following the arrow directions.   The folding of the center region is known as "open sink-fold" .

12. Finish shrinking the origami book model following the arrow directions of the step #11.   Prepare to rotate the upper parts of the origami book model by 90 degrees in the two reverse directions.

 

 

 

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