Origami butterfly based on open-closed sink-fold (page 2)

 

01. We will start with "balloon base" .   If you don't know what balloon base is, study the above link to preapare this base.   Now, you must be ready with a balloon base.   Prepare to rotate it by 180 degrees.

02. Rotate the base by 180 degrees.   Prepare to apply a horizontal valley-fold at 1/3 height from the bottom.

 

 

 

1 2 3 4 5 6 7 8 9 10 11 12