How to make a large heart origami envelope (page 17)

 

31. Unfold the horizontal "valley-fold" of the step #29.   Prepare to insert the lower flap into the upper pocket.   You need to place the lower flap (#2) just behind the heart (#1) before insert the lower flap into the upper pocket.

32. Place the lower flap just behind the heart.

 

 

 

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